GE Industrial Solutions OKCV3000CN DeviceNet - Manual (Page 39)

DeviceNet
6. HOW TO CONNECT DGFC AS SLAVE OF A PLC
(PREDEFINED MASTER/SLAVE CONNECTION SET)
AND EXECUTE A BRICKS PROGRAM
6.1. GENERAL DESCRIPTION
This kind of connection is made with many slaves and one and only one master, usually a PLC (or PC) card.
With this connection Bricks program execution is allowed. The DGFC acts as a slave communication card and
as a programmable card.
6.2 USER GUIDE
In order to use this feature of the DGFC, do the following:
1) on the DGFC
:
-
disconnect the card from the DeviceNet network
-
set parameter 350 of the DGFC to the appropriate value
-
set the appropriate MACID in “DnetMacld” parameter (MACID must be unique in the network)
-
set the appropriate baudrate in “DnetBaud” parameter (baud rate must be the same in the network)
-
set “DNSvrCnxn” to the appropriate value
-
set “DNMsg” to 0 (this is the default value)
-
set “Dnetl/Oepr” to 0 (this is the default value)
-
set “SlaveMapLow” and “SlaveMapHigh” to 0 (this is the default value)
-
set “DN#RxPLC” at the number of bytes to be received from PLC
-
set “DN#TxPLC” at the number of bytes to be transmitted to PLC
-
when planning your Bricks program keep in mind that:
-
received values will be placed in FWA from word 64 to 73;
-
transmitted values must be placed in FWA from word 74 to 83;
-
received and transmitted values will be read by REIX Brick and will be written by V/FIX Brick;
-
DGFC never initiates transmitting (is a slave-only node);
-
it’s responsibility of Bricks program to act over the FWA;
-
set “DnetEnable” parameter to 1
2)on master node: (Remember that for parameters configuration you must use PLC software)
-
configure the DGFC as a Polled device
-
configure the proper number of bytes transmitted/received by the PLC
LIlA
HOW TO CONNECT DGFC