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Chapter 7
Module Calibration
7-6
10. Set (1) the WR bit 11 (13) in BTW word 0.
For PLC systems: Monitor the OK bit 11 (13) in BTR word 0 until
it is set (1).
For SLC systems: Allow at least 5 seconds before continuing.
11. Exit the calibration mode.
Calibrating Current Inputs
Use the procedure below to calibrate the current inputs on your analog
block I/O module. The procedure can be used for either PLC or SLC
systems.
You can calibrate any single input or output individually or, you can
calibrate them simultaneously.
Important: To allow the module to stabilize, energize the module for at
least 30 minutes before calibrating.
To calibrate your module:
1.
Connect your test equipment for the input you want to calibrate. This
is shown in the figure below.
0-5V or 0-20mA
Reference Source
Important: To calibrate four current inputs simultaneously, you need four
independant current sources.
2.
Verify normal operation.
3.
Select calibration mode, current input mode and the input channels
you want to calibrate.
For example, to calibrate input channel 0, set bits 15 (17), 14 (16), 08
(10) and 01 of BTW word 0 (C101h).
4.
Apply 0.000 milliamps to inputs.
A
V
R
V
IN
I
IN
RET
GND
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