Rockwell Automation Current Input Module - Manual (Page 29)

4Ć11
Register 31
Bits 0Ć15
14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RW RW RW RW RW RW RW RW
Bits 1 and 0 = When An Input Value Is Out Of Range, The Current Input Module
Will:
0ă0ă=ăRetain Old Input Value
0ă1ă=ăForce Input Value to Low Low Alarm Value
1ă0ă=ăForce Input Value to High High Alarm Value
1ă1ă=ăRetain Old Input Value
Bits 5 to 2 = Reserved
Bit 6= Cycle Frequency Averaging
ąă 0=ĂEnable
ąă 1=ĂDisable
Bit 7=ĂSquare Root Extraction
ą 0=ĂDisable
ąă 1=ĂEnable
Bits 11 to 8 = Reserved
Bits 15 to 12 = Configuration Command Code
0ă0ă0ă0ă=ĂREADY State
0ă0ă0ă1ă=ĂReset Configuration For This Channel
0ă0ă1ă0ă=ĂRead Configuration For This Channel
0ă0ă1ă1ă=ĂWrite Configuration For This Channel
0ă1ă0ă0ă=Ă50 Hz AĆC Line Frequency
0ă1ă0ă1ă=Ă60 Hz AĆC Line Frequency
- - - - - - - -
15
Figure 4.10 Ć Configuration Command Register
When configuring a channel, you must define values for registers 23
through 30 before placing a value in register 31. Register 31 must be
the last register that you place a value in as you configure each
channel.
When you are finished with register 31 for the channel you are
configuring, and the module has processed the information, the
module will set bit 15 of register 22 equal to one. You must then set
bits 12 to 15 of register 31 equal to zero. This places the module in
the READY state. The module then resets bit 15 of register 22 which
indicates that it is ready to receive another command. If you attempt
to enter another command before resetting bits 12 to 15 of
register 31, a configuration error will result in register 22.
Bits 0 and 1 specify what action should occur when an input value is
out of range. The default condition is to retain the old input value
from the channel data registers (0 to 15).
Bits 2 to 5 are reserved for future use.
Bit 6 defines whether or not cycle averaging is enabled for the
channel specified in register 23. The default condition (0) enables
cycle averaging.
Bit 7 defines whether or not square root extraction is enabled for the
channel specified in register 23. The default condition (0) disables
square root extraction. The square root function provides flow
information directly from a differential pressure input.