Comm Baud Rate (0Bh); Comm Data Format (0Ch) - MSA FL500 Operating Manual

Operational Mode Command Register Details

3.11. Comm Baud Rate (0BH)

A Read command sends back the Comm baud rate in use by the FL500. A Write command changes the
baud rate.
When the slave baud rate changes, Modbus communications stop until the master changes its baud rate to
the new slave baud rate.
Baud Rate
19.2K
9600 bps
4800 bps
2400 bps
This function is indicated on the Low data byte. The High data byte is not used.
EXCEPTION: If an illegal data value is entered, Exception Code 03 (Illegal Data Value) is sent back.
NOTE: If you ground the Alarm Reset input during the start-up cycle (approximately 10 seconds), the
baud rate will default to 19.2K.

3.12. Comm Data Format (0CH)

A Read command sends back the Comm data format in use by the FL500. A Write command changes the
data format.
When the data format changes, Modbus communications stop or communication errors occur until the
master changes its data format to the new slave data format.
Data Parity
8 None
8 Even
8 Odd
US
8 None
This function is indicated on the Low data byte. The High data byte is not used.
EXCEPTION: If an illegal data value is entered, Exception Code 03 (Illegal Data Value) is sent back.
NOTE: If you ground the Alarm Reset input during the start-up cycle (approximately 10 seconds), the
data format will default to 8-N-1.
14
Low Data Byte
192
96
48
24
Low Data
Stop Format
Byte
1 8-N-1 00
1 8-E-1 01
1 8-O-1 02
2 8-N-2 03
FL500 Modbus Communication Operating Manual
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Read/Write
Read/Write
Read/Write
Read/Write
Access
Read/Write
Read/Write
Read/Write
Read/Write