Rockwell Automation 1771-CFM,D17716.5.99 CONFIGURABLE FLOWMET - Manual (Page 65)

Appendix
C
Publication 1771Ć6.5.99 - December 1995
Replace Your QRC Module
Use this appendix to install the CFM module as a replacement for the
QRC module.
To replace your QRC module you See page
Check Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . C-1
Remove Your QRC Module . . . . . . . . . . . . . . . . . . . . . . . . .
C-2
Set the Configuration Jumpers . . . . . . . . . . . . . . . . . . . . . . . C-3
Set the Module Operation Jumper . . . . . . . . . . . . . . . . . . C-3
Check the Input Channel Jumpers . . . . . . . . . . . . . . . . . . C-4
Install the CFM Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
Make Connections to the New Wiring Arm . . . . . . . . . . . . . . . C-6
Resume Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . C-8
Edit Your Ladder Logic Program . . . . . . . . . . . . . . . . . . . C-8
Read Data From the CFM Module . . . . . . . . . . . . . . . . . . C-9
Interpret Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . C-10
Additional Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-10
Important: We assume that you are using a QRC module in your
existing system and that you are familiar with I/O
module installation/removal procedures.
The CFM (QRC) module, interfaces PLC processors with magnetic
pickups, single-channel shaft encoders or turbine flowmeters.
When configured for QRC operation, the CFM (QRC) module
calculates the frequency, beginning on the leading edge of a pulse,
for 12-18ms.
The CFM (QRC) module is generally compatible with, but does not
require the use of, turbine flowmeter signal preconditioning modules.
It provides rate data in 2’s complement binary format to the
PLC processor’s data table through block data transfers. Rates as
high as 15.8kHz are supported.
!
ATTENTION: The maximum current drawn by the
CFM (QRC) module is 1.0A. This current (1.0A) is
0.25A greater than the maximum current drawn by
your QRC module (0.75A).
Consider the power usage of all modules in the I/O
chassis to prevent overloading either the chassis
backplane or power supply.
What This Appendix
Contains
What the CFM Module
Does
Check Power
Requirements