Technical data

Chapter 4 – Communication
4-10 RS485 and RS232 Adapter Installation and Start-up Guide
Example of the effect of AI1 value on fieldbus reference.
Assume that 2008
MAXIMUM FREQ = 50 Hz
Assume that fieldbus reference 1 is 5000 (corresponding to 25 % of full scale)
and voltage at AI1 is 3 V (corresponding to 30 % of full scale).
1. If setting
COMM+AI1 is used, then corrected fieldbus reference is 25 % + 30 %
- 50 % = 5 % or 2.5 Hz.
2. If setting
COMM*AI1 is used, then corrected fieldbus reference is 25 % * 30 %
/ 50 % = 15 % or 7.5 Hz.
2
1
50 %
AI1
100 %
50 %
100 %
FIELDBUS REFERENCE
REF
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