Reference/Feedback; Parameter Information; Scale Factors For Plc Communication - Allen-Bradley SMC-50 User Manual

Reference/Feedback

Parameter Information

Scale Factors for PLC
Communication
Table 51 - Logic Command Word (Control)
Bit
Control
Number
0 Stop
1 Start
2 Stop Option
3 Clear Fault
5 Emergency Run
8...10 Reserved
11 Aux Enable
12 Network #1
13 Network #2
14 Network #3
15 Network #4
The SMC-50 control module does not offer the analog Reference feature. The
analog Feedback feature is supported and provides Current Average, Parameter
5, automatically as the feedback word.
A complete listing of the SMC-50 parameters is located in
page 199.
The parameter values stored and produced by the SMC-50 through
communication are unscaled numbers. When reading or writing values from a
PLC image table, it is important to apply the proper scaling factor, which is based
on the number of decimal places.
Read Example
Power Factor, Parameter 17—The stored value is 85. Because this value has two
decimal places, the value should be divided by 100. The correctly read value is
0.85.
Write Example
Motor FLC, Parameter 78—The example value, which is to be written to the
SMC-50 control module, is 75 A. Because this value has one decimal place, the
value should be multiplied by 10. The correctly written value is 750.
Rockwell Automation Publication 1560F-UM001A-EN-P - June 2019
Description
1
Coast/Inhibit
Start
Stop/Maneuver
Clear fault
Enable emergency run mode
These bits must always be set to 0
Use the Network #1 - #4 bits
Closes any output configured for
Network #1
Closes any output configured for
Network #2
Closes any output configured for
Network #3
Closes any output configured for
Network #4
Communications Chapter 7
0
No action
No action
No action
No action
Disable emergency run mode
Ignore the Network #1 - #4 bits
Opens any output configured for
Network #1
Opens any output configured for
Network #2
Opens any output configured for
Network #3
Opens any output configured for
Network #4
Appendix A on
141