Digital inputs and outputs
This controller is equipped with digital inputs and outputs.
Bit assignment
The software of the controller assigns each input and output two bits in the respective object (e.g., 60FDh Digital Inputs or 60FEh Digital Outputs):
- The first bit corresponds to the special function of an output or input. These functions are always available on bits 0 to 15 (inclusive) of the respective object. These include the limit switches and the home switch for the digital inputs and the brake control for the outputs.
- The second bit shows the output/input as a level; these are then available on bits 16 to 31.
Example |
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To manipulate the value of output 2, always use bit 17 in 60FEh. To activate the "negative limit switch" special function of input 1, set bit 0 in 3240h:01h; to query the status of the input, read bit 0 in 60FDh. Bit 16 in 60FDh also shows the status of input 1 (independent of whether or not the special function of the input was activated). This assignment is graphically illustrated in the following drawing. |
Digital inputs
Overview
The following inputs are available:
Input | Special function | Switching threshold switchable | Differential / single-ended |
---|---|---|---|
1 | Negative limit switch | yes, 5 V or 24 V (see 3240h:06h) | The inputs can only be switched together (see 3240h:07h) |
2 | Positive limit switch / direction input in clock-direction mode | yes, 5 V or 24 V (see 3240h:06h) | |
3 | Home switch / Clock input in clock-direction mode | yes, 5 V or 24 V (see 3240h:06h) | |
4 | None | yes, 5 V or 24 V (see 3240h:06h) | |
5 | None | yes, 5 V or 24 V (see 3240h:06h) | |
6 | None | yes, 5 V or 24 V (see 3240h:06h) |
If you set 3240h:07h to the value "1", three differential inputs are available instead of six single-ended inputs:
Pin | Function |
---|---|
2 | - Input 1 |
3 | Input 1 |
4 | - Input 2 |
5 | Input 2 |
6 | - Input 3 |
7 | Input 3 |
Object entries
The value of an input can be manipulated using the following OD settings, whereby only the corresponding bit acts on the input here.
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3240h:01h (Special Function Enable): This bit allows special functions of an input to be switched off (value "0") or on (value "1"). If input 1 is not used as, e. g., a negative limit switch, the special function must be switched off to prevent an erroneous response to the signal generator. The object has no effect on bits 16 to 31.
The firmware evaluates the following bits:
- Bit 0: Negative limit switch (see Limitation of the range of motion)
- Bit 1: Positive limit switch (see Limitation of the range of motion)
- Bit 2: Home switch (see Homing)
- Bit 3: Interlock (see interlock function)
If, for example, two limit switches and one home switch are used, bits 0–2 in 3240h:01h must be set to "1".
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3240h:02h (Function Inverted): This subindex switches from normally open logic (a logical high level at the input yields the value "1" in object 60FDh) to normally closed logic (the logical high level at the input yields the value "0").
This applies for the special functions (except for the clock and direction inputs) and for the normal inputs. If the bit has the value "0", normally open logic applies; for the value "1", normally closed logic applies. Bit 0 changes the logic of input 1, bit 1 changes the logic of input 2, etc.
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3240h:03h (Force Enable): This subindex switches on the software simulation of input values if the corresponding bit is set to "1".
In this case, the actual values are no longer used in object 3240h:04h, but rather the set values for the respective input. Bit 0 corresponds to input 1 here, bit 1 to input 2, etc.
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3240h:04h (Force Value): This bit specifies the value that is to be read as the input value if the same bit was set in object 3240h:03h.
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3240h:05h (Raw Value): This object contains the unmodified input value.
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3240h:06h (Input Range Select): This can be used to switch inputs – that are equipped with this function – from the switching threshold of 5 V (bit is "0") to the switching threshold of 24 V (bit is "1"). Bit 0 corresponds to input 1 here, bit 1 to input 2, etc.
- 3240h:07h (Differential Select): With the inputs, this subindex switches between "single-ended input" (value "0" in the subindex) and "differential input" (value "1" in the subindex) once for all inputs.
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60FDh (Digital Inputs): This object contains a summary of the inputs and the special functions.
Computation of the inputs
Computation of the input signal using the example of input 1:
The value at bit 0 of object 60FDh is interpreted by the firmware as negative limit switch; the result of the complete computation is stored in bit 16.
Input Routing
Principle
To perform the assignment of the inputs more flexibly, there is a mode called Input Routing Mode. This assigns a signal of a source to a bit in object 60FDh.
Activation
This mode is activated by setting object 3240h:08h (Routing Enable) to "1" .
Routing
Object 3242h determines which signal source is routed to which bit of 60FDh. Subindex 01h of 3242h determines bit 0, subindex 02h determines bit 1, and so forth. The signal sources and their numbers can be found in the following lists.
Number | ||
---|---|---|
dec | hex | Signal source |
00 | 00 | Signal is always 0 |
01 | 01 | physical input 1 |
02 | 02 | Physical input 2 |
03 | 03 | Physical input 3 |
04 | 04 | Physical input 4 |
05 | 05 | Physical input 5 |
06 | 06 | Physical input 6 |
07 | 07 | Physical input 7 |
08 | 08 | Physical input 8 |
09 | 09 | Physical input 9 |
10 | 0A | physical input 10 |
11 | 0B | Physical input 11 |
12 | 0C | physical input 12 |
13 | 0D | Physical input 13 |
14 | 0E | Physical input 14 |
15 | 0F | Physical input 15 |
16 | 10 | Physical input 16 |
68 | 44 | Encoder input "A" |
69 | 45 | Encoder input "B" |
70 | 46 | Encoder input "Index" |
The following table describes the inverted signals of the previous table.
Number | ||
---|---|---|
dec | hex | Signal source |
128 | 80 | Signal is always 1 |
129 | 81 | Inverted physical input 1 |
130 | 82 | Inverted physical input 2 |
131 | 83 | Inverted physical input 3 |
132 | 84 | Inverted physical input 4 |
133 | 85 | Inverted physical input 5 |
134 | 86 | Inverted physical input 6 |
135 | 87 | Inverted physical input 7 |
136 | 88 | Inverted physical input 8 |
137 | 89 | Inverted physical input 9 |
138 | 8A | Inverted physical input 10 |
139 | 8B | Inverted physical input 11 |
140 | 8C | Inverted physical input 12 |
141 | 8D | Inverted physical input 13 |
142 | 8E | Inverted physical input 14 |
143 | 8F | Inverted physical input 15 |
144 | 90 | Inverted physical input 16 |
196 | C4 | Inverted encoder input "A" |
197 | C5 | Inverted encoder input "B" |
198 | C6 | Inverted encoder input "Index" |
Example |
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Input 1 is to be routed to bit 16 of object 60FDh: The number of the signal source for input 1 is "1". The routing for bit 16 is written in 3242h:11h. Hence, object 3242h:11h must be set to the value "1". |
Interlock function
The interlock function is a release that you control via bit 3 in 60FDh. If this bit is set to "1", the motor can move. If the bit is set to "0", the controller switches to the error state and the action stored in 605Eh is executed.
To activate the interlock function, you must switch on the special function by setting bit 3 in 3240:01h to "1".
Use Input Routing to define which signal source is routed to bit 3 of 60FDh and is to control the interlock function.
Example |
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Input 4 is to be routed to bit 3 of object 60FDh to control the interlock function. A low level is to result in an error state.
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Digital outputs
Outputs
The outputs are controlled via object 60FEh. Here, output 1 corresponds to bit 16 in object 60FEh, output 2 corresponds to bit 17, etc., as with the inputs. The outputs with special functions are again entered in the firmware in the lower bits 0 to 15. The only bit assigned at the present time is bit 0, which controls the motor brake.
Wiring
The outputs are implemented as "open drain". Hence, an external voltage supply is always necessary.
Example |
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The digital output signal should continue to be used. For this purpose, a circuit as shown in the following figure is to be realized. With a supply voltage of +24 V, a resistance value Rexternal of 10 kΩ is recommended. |
Example |
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A simple load is to be used with the digital output. |
Object entries
Additional OD entries are available for manipulating the value of the outputs (see the following example for further information). As with the inputs, only the bit at the corresponding location acts on the respective output:
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3250h:01h: No function.
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3250h:02h: This is used to switch the logic from normally open to normally closed. Configured as normally open, the output outputs a logical high level if the bit is "1". With the normally closed configuration, a logical low level is output accordingly for a "1" in object 60FEh.
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3250h:03h: If a bit is set here, the output is controlled manually. The value for the output is then in object 3250h:4h; this is also possible for the brake output.
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3250h:04h: The bits in this object specify the output value that is to be applied at the output if manual control of the output is activated by means of object 3250h:03h.
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3250h:05h: The bit combination applied to the outputs is stored in this subindex.
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3250h:08h: For activating the Output Routing.
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3250h:09h: For switching control of the Power LED on/off. If bit 0 is set to "1", the green LED is activated (flashes in normal operation). If bit 1 is set to "1", the red LED is activated (flashes in case of an error). If the bit is set to "0", the respective LED remains off.
Computation of the outputs
Example for calculating the bits of the outputs:
Output Routing
Principle
The "Output Routing Mode" assigns an output a signal source; a control bit in object 60FEh:01h switches the signal on or off.
The source is selected with 3252h:01 to n in the "high byte" (bit 15 to bit 8). The assignment of a control bit from object 60FEh:01h is performed in the "low byte" (bit 7 to bit 0) of 3252h:01h to n (see following figure).
Activation
Routing
The subindex of object 3252h determines which signal source is routed to which output. The output assignments are listed in the following:
Subindex 3252h | Output Pin |
---|---|
01h | Configuration of the PWM output (software PWM) |
02h | Configuration of output 1 |
03h | Configuration of output 2 (if available) |
… | … |
0nh | Configuration of output n (if available) |
Subindices 3252h:01h to 0nh are 16 bits wide, whereby the high byte selects the signal source (e. g., the PWM generator) and the low byte determines the control bit in object 60FEh:01.
Bit 7 of 3252h:01h to 0nh inverts the controller from object 60FEh:01. Normally, value "1" in object 60FEh:01h switches on the signal; if bit 7 is set, the value "0" switches on the signal.
Number in 3252:01 to 0n | |
---|---|
00XXh | Output is always "1" |
01XXh | Output is always "0" |
02XXh | Encoder signal (6063h) with frequency divider 1 |
03XXh | Encoder signal (6063h) with frequency divider 2 |
04XXh | Encoder signal (6063h) with frequency divider 4 |
05XXh | Encoder signal (6063h) with frequency divider 8 |
06XXh | Encoder signal (6063h) with frequency divider 16 |
07XXh | Encoder signal (6063h) with frequency divider 32 |
08XXh | Encoder signal (6063h) with frequency divider 64 |
09XXh | Position Actual Value (6064h) with frequency divider 1 |
0AXXh | Position Actual Value (6064h) with frequency divider 2 |
0BXXh | Position Actual Value (6064h) with frequency divider 4 |
0CXXh | Position Actual Value (6064h) with frequency divider 8 |
0DXXh | Position Actual Value (6064h) with frequency divider 16 |
0EXXh | Position Actual Value (6064h) with frequency divider 32 |
0FXXh | Position Actual Value (6064h) with frequency divider 64 |
10XXh | PWM signal that is configured with object 2038h:05h and 06h |
11XXh | Inverted PWM signal that is configured with object 2038h:05h and 06h |
On any change of the "encoder signal" (6063h) or the current position (6064h in user-defined units) by an increment, a pulse is output at the digital input (for frequency divider 1). Take this into account when selecting the frequency divider and the unit, especially when using sensors with low resolution (such as Hall sensors).
Example |
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The encoder signal (6063h) is to be applied to output 1 with a frequency divider 4. The output is to be controlled with bit 5 of object 60FE:01. The output is switched on by setting bit 5 in object 60FE:01. |
Example |
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The brake PWM signal is to be applied to output 2. Because the automatic brake control uses bit 0 of 60FE:01h, this should be used as control bit. |