ElmoMC Multi-Axis Motion Controller-Maestro - Manual (Page 227)

Returns: 0 on success or error code.
Example:
masterObj.readDiscreteInputs(1, ::iStaticArray, 10)
12.3.3 MODBUS Master Object 16-bit Access Functions
For Modicon Register Table 4:00000 (Holding Registers) and Table 3:00000 (Input
Registers)
1. readHoldingRegister(int address)
MODBUS function code 03. Reads the content of a single output register
(holding registers, 4:00000 table).
Parameters:
address – output register (holding register) address (range: 1 - 65536)
Returns: output register value (range: 0 - 65536).
Example:
masterObj.readHoldingRegister(1)
Function using For command interpreter only
2. int retVal = readHoldingRegisters(int startAddress, int ::iStaticArray , int num)
MODBUS function code 03. Reads the content of the output registers (holding
registers, 4:00000 table). Up to 125 registers.
Parameters:
startAddress – start register address (range: 1 - 65536)
iStaticArray – static integer array which will contain the data read
num - number of registers to be read (range: 1-125)
Returns: 0 on success or error code.
Example:
masterObj.readHoldingRegisters(1, ::iStaticArray, 3)
Maestro Software Manual Ethernet/IP Communication
MAN-MASSW (Ver. Q)
12-7