Comtrol DeviceMaster EtherNet/IP-Modbus EIP-MOD User Manual page 130

| Read Coils Service (4C Hex)
Parameter
startAddress INT (16 bit WORD) 0 to FFFF hex
numCoils INT (16 bit WORD) 1 to 2000 (7D0 hex) Number of coils represented by a single bit.
Parameter Data Type
SINT array
coilData
(8 bit BYTEs)
130 - Chapter 10. PLC Programming for Modbus Object (44 Hex)
Data Type Range
Range
0 to FF hex
Starting address base 0
Description
Coil data with coil each being represented by a single bit.
DeviceMaster EIP-MOD User Guide: 2000664 Rev. A
Description