Serial Communication (Modbus) - gefran GFX4-IR Configuration And Programming Manual

SERIAL COMMUNICATION (MODBUS)

There are two Modbus addressing modes for variables and configuration parameters:
- GFX compatible
- GFX4
The modes are selected with dip-switch-7.
All the parameters of formulation are saved in internal storage EEPROM (not
flown them), of which a maximum of 100.000 cycles of cancellation is guaranteed/
writing. In order to avoid the express deterioration of the same one, when the
only necessary writing is advised some. They make exception the parameters
local setpoint SP (address Modbus 138) and MANUAL_POWER (address
Modbus 252), whose memorization in EEPROM can be disabled by means of
formulation of the SP.r parameter
GFX-compatible mode (dip-switch-7 =ON)
This lets you uses supervision programs created for Geflex modules.
Memory is organized in 4 groups:
- Zone 1
- Zone 2
- Zone 3
- Zone 4
In each zone, the variables and parameters have the same address as a Geflex instrument; the value (Cod) set on
the rotary switches corresponds to that of Zone 1; the values in the other zones are sequential.
Shared word parameters for the GFX4 instrument have addresses starting at 600.
Shared bit parameters have addresses high than 80.
Examples:
if the rotary switches have value 14, node 14 addresses Zone 1, node 15 Zone 2, node 16 Zone 3, node 17 Zone 4.
The process variable (PV) for Zone 1 has address Cod 0, the PV for Zone 2 has address Cod+1, 0, etc...
Parameter out.5, which defines the function of output OUT 5 on the GFX4, has address Cod 611.
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