Modbus Function Support; Contact Information; Sales And Applications Support; Factory And Repairs - Honeywell P531 Operating Manual

To reset factory defaults for P531 front port write 30064 (RS-
232)
*40084 Error code RS422 port only (P531 front port is unde-
fined)
P531 front panel access only (RS232)
*40085 Baud for the RS422 port
*40086 Parity for the RS 422 port
*40087 Modbus Address for the RS 422 port

Modbus function support:

* 03 Holding Register Read
* 06 Preset Single Holding Register
* 16 Preset Multiple (Maximum 5 consecutive locations per
message)
Note: If writing multiple presets a failure message
may occur if one of the presets does not fall within
parameters. Presets before the invalid data will be
written correctly to the register. All parameters after
invalid parameter are ignored and an "Illegal data
value" message is returned.
MODELS P531, P532 AND P532UI OPERATING MANUAL
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