Delta RMC151 User Manual
Page 693
7 Hardware
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SSI Data Bits: 8-32
Configure Channel as a Quadrature Axis Input
For each channel that will be used as an input to an axis, do the following:
1. Choose Quadrature Input, then click OK.
2. Wire the quadrature input as described in the RMC150 UI/O Wiring topic.
3. Assign the input to an axis as described in the Defining Axes topic.
4. In the Axis Parameters Pane, set the following axis parameters:
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Input Termination to apply termination. Termination should always be used. If
the high-speed channel inputs are daisy-chained, apply termination only to the
last input in the chain. See RMC150 UI/O Wiring topic for details.
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If the axis will use the Reg input for registration or homing, uncheck Filter Reg
Input if you need a faster response and are not concerned about electrical
noise.
5. Scale the axis feedback as described in the Quadrature Scaling topic.
Configure Channel as an SSI Axis Input
For each channel that will be used as an input to an axis, do the following:
1. Choose SSI Input, then click OK.
2. Wire the SSI input as described in the RMC150 UI/O Wiring topic.
3. Assign the input to an axis as described in the Defining Axes topic.
4. In the Axis Parameters Pane, set the following axis parameters:
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•
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SSI Termination to apply termination. Termination should always be used. If
the high-speed channel inputs are daisy-chained, apply termination only to the
last input in the chain. See RMC150 UI/O Wiring topic for details.
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Set the SSI Clock Mode to Standard
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SSI Clock Rate, if necessary. The default value is usually fine.
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SSI Wire Delay, if necessary, as described in the SSI Wire Delay topic.
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SSI Overflow Mode, if necessary. The default value is usually fine.
5. Scale the axis feedback as described in the SSI Scaling topic.
Configure Daisy-Chained SSI Devices to Multiple UI/O Modules
Daisy-chaining refers to wiring an SSI device to multiple UI/O modules. When wiring a
daisy-chained SSI system, the SSI master (the UI/O) should be on one end of the daisy
chain with the SSI device on the other end, and any monitoring UI/O modules in the
middle of the daisy chain. The wiring must be done in a sequential fashion, that is, the
wiring goes from the SSI device to the first UI/O, then from that UI/O to the next UI/O,
etc. Apply termination only to the SSI master. See RMC150 UI/O Wiring for more details.
1. Configure a channel on the master UI/O as an SSI Axis Input as described in the
Axis Input section above. Use the SSI Termination parameter to apply termination.
2. For the remaining monitoring UI/O modules:
a. Configure a channel as SSI Axis Input as described in the Axis Input section
above, but set the SSI Clock Mode parameter to Monitor and do not apply
termination.
Configure Bidirectional Communication Between Two RMCs
The UI/O module can be used to communicate between RMCs.
1. Configure the UI/O module on the first RMC as follows:
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