User manual

IEC61131 User and Reference Manual
April 22, 2008
402
Read Holding Register
The Read Holding Register function reads data from holding registers in the remote device.
Data can be written into the analog input or the analog output sections of the I/O database.
Any number of registers may be read up to the maximum number supported by the slave
device or the maximum number above, whichever is less. The read may start at any
address, provided the entire block is within the valid register range. Each register is 16 bits.