Evolution Controls EVO/ECM-Modbus, Application Manual

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EVO/
™ECM-Modbus RTU
Series 2 Page 21
Application Guide
©2020 All Rights Reserved
Evolution Controls Inc.
San Diego, CA USA
Write Multiple Registers Command (16)
Starting
Register
Number of
Registers Byte
Register 1 Register 2 - 5
Address Function HI LO HI LO Count HI LO HI LO Error Check
0-247 16 00 00 00 05 10 0-255 0-255 00 0-100 CRC-16
•
All RTUs respond to an address "0" query. All EVO/ECM-Modbus RTUs process the write, but
none reply.
•
The command code is 16.
•
The EVO/ECM-Modbus RTU only responds to a query for the first five registers.
•
The register number is two bytes long. The high byte is 00 and the low byte is 05, representing
the five dynamic data registers the EVO/ECM-Modbus RTU allows to be read by this command.
•
The byte count is fixed at 10.
Reply to Modbus Master
Register Number Data
Address Function HI LO HI LO Error Check
0-247 16 00 00 00 05 CRC-16
•
Descriptions of the reply fields are the same as the descriptions of the query fields above.