780397M_MSW_GFX4-GFXTERMO4_08-2018_ENG
SERIAL COMMUNICATION (MODBUS)
There are two Modbus addressing modes for variables and conguration parameters:
- GFX compatible
- GFX4
The modes are selected with dip-switch-7.
All the parameters of formulation are saved in internal storage EEPROM (not
own 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 Geex 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 Geex 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 denes the function of output OUT 5 on the GFX4, has address Cod 611.
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