Schneider Electric 890USE17700 - Manual (Page 167)

Advanced Configuration Features
890USE17700 April 2004 167
Reading Register
Data All the registers in the data image can be read by an HMI panel connected to the
island at the NIM’s CFG port (See The CFG Interface, p. 33). The Advantys
configuration software reads all this data, and displays blocks 1, 2, 8 and 9 in the
Modbus Image screen in its I/O Image Overview.
Writing Register
Data Some registers, usually some configured number of registers in block 9 (registers
49488 through 49999) of the data image, may be written to by an HMI panel (See
HMI Panel Configuration, p. 170).
The Advantys configuration software may also be used to write data to the registers
in block 1 (registers 40001 through 44096). The configuration software must be the
island bus master in order for it to write to the data image—i.e., the island must be
in test mode.