Honeywell UMC800 - Electrical considerations; Controller grounding; Taking electrical noise precautions

Protocol Description
10 RS232 Communications Reference Manual 8/99
2.10.3 Write Scattered 32-bit Values
Below are examples of a Read Scattered 32-bit Value message exchange.
Example 1
Write a local Set Point of 1200.0 to a controller PID block, assuming block number is 3.
Request Message
10 02 01 ff 01 01 03 01 00 02 03 01 44 96 00 00 bf40 10 03
DLE
STX
Destination
Address
Source Address
Sequence Number
Write
Scattered Values
# of Values
Filler Byte
Dynamic Parameter
Block # 3
Index # 1
CRC
DLE
ETX
LSP = 1200.0
Response Message
Controller to Host: (good message)
DLE
ST X
Destination
Address
Source Address
Sequence Number
Scattered 32 bit Values
Acknowledge
CRC
DLE
ET X
Controller to Host (bad message, with a typical error code)
10|02|FF|01|0a|01|7e|80|10|03