Evolution Controls EVO/ECM-Modbus - Read Multiple Coil Registers Command (01)

©Evolution
Controls Inc.
10-Sept-2020
EVO/™ECM-Modbus RTU Series 2 Page 23
Application Guide
©2020 All Rights Reserved
Evolution Controls Inc.
San Diego, CA USA
Write Single Coil Register Command (05)
Register Number
Data
Address
Function
HI
LO
HI
LO
Error Check
0-247
05
00
1-34
XX
00
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 05.
• The register number is two bytes long. The high byte is 00, the low byte is an integer within the
range of valid register, 1 to 34.
• The data field is two byte long. XX = FF to switch the coil on, XX = 00 to switch the coil off.
Reply to Modbus Master
Register Number
Data
Address
Function
HI
LO
HI
LO
Error Check
0-247
05
00
1-34
XX
00
CRC-16
• The response to a write single coil register query is identical to the query.