Connection - gefran GFX4-IR Configuration And Programming Manual

GFX4 mode (dip-switch-7=OFF)
This lets you optimize the efficiency of serial communication by integrating 4 zones in the GFX4-IR. Memory is orga-
nized in 5 groups: 4 already in GFX-compatible mode, plus one group defined as custom:
- Custom (additional memory map for dynamic addresses)
- Zone 1
- Zone 2
- Zone 3
- Zone 4
The custom group contains variables and parameters for a maximum of 120 words. The meaning of these words can
be changed.
There is a single value (Cod) set on the rotary switches; i.e., one for each GFX4-IR instrument. To access the data
in each zone, simply add an offset to the address (+1024 for Zone 1, +2048 for Zone 2, +4096 for Zone 3, +8192 for Zone 4).
Words in the custom group have addresses 0,...,119. The variables and parameters are defined by default. At ad-
dresses 200,...,319 we have words containing the value of the address of the corresponding variables or parameters. These
addresses can be changed by the user, offering the ability to read/write data with multi-word messages structured according
to various supervision requirements.
Protection of Maps 1-2
You have to write the value 99 on addresses 600 and 601 to enable change of
the custom group (addresses 200... 31). This value is reset at each switch-on.
Examples:
you can access the PV variable in Zone 1 with address Cod, 0+1024 or address Cod, 0 custom variable 1 (address Cod, 200
has value 1024);
you can access the PV variable in Zone 2 with address Cod, 0+ 2048 or address Cod, 29 custom variable 30 (address Cod,
229 has value 2048);
if you want to read the 4 process variables in sequence at the first 4 addresses, set Cod, 200 = 1024, Cod.201 = 2048, Cod,202
= 4096, Cod,203 = 8192.

CONNECTION

Each GFX4-IR has an optically isolated serial port RS485 (PORT 1) with standard Modbus protocol via connectors
S1 and S2 (type RJ10).
Connector S3 is suitable for direct connection to a Geflex slave module or to a GFX-OP operator terminal. Remember that the
maximum communication speed of these devices is 19200 baud.
You can insert a serial interface (PORT 2). There are various models based on the field bus required: Modbus, Pro-
fibus DP, CANopen, DeviceNet and Ethernet.
This communication port (PORT 2) has the same Cod address as PORT 1.
The parameters for PORT 2 are bAu.2 (select baud-rate) and Par.2 (select parity).
The Cod parameter (read only) shows the value of the node address, settable from 00 to 99 with the 2 rotary switches; the
hexadecimal settings are reserved.
A parameter can be read or written from both communication ports (PORT 1 and PORT 2).
Changing the
may cause communication failure.
To set the bAu and PAr parameters, you have to run the Autobaud procedure described in the "Instruction and warnings" ma-
nual. Run the Autonode procedure for the Slave node parameter. For the Master, simply switch off and then back on.
8
(select baud-rate) and/or
bAu
(select parity) parameters
PAr
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