6.6 Cluster Operation (optional)
64
Establishing Cluster Operation:
To set the ERS systems to cluster mode, the following steps must be performed.
Step 1
: Selection of Master and Slave device at the terminal:
▬
Unit 1: => Unit Parameter => Unit Operation => Master
▬
Unit 2: => Unit Parameter => Unit Operation => Slave
Then switch of both devices.
Step 2:
Establishing the communication and connecting power and control lines:
▬
Connect communication lines CAN-A and RS422 (use Cross-Connect-Ethernet-cables)
for Master-Slave-Communication.
▬
Connect the load lines according to the schematics for parallel (
Fig. 57, p. 62
) or serial
(
Fig. 58, p. 63
) operation. The interconnection can be changed later while the cluster
function is still active.
▬
If the ERS systems also have the option “channel stop” an additional communication
line for the emergency stop relays must be established. The control lines from the
slave device to the automation system must be removed and replaced by a dummy
plug with bridged channel stop.
Step 3 :
Switch the devices back on:
▬
Both system will start independent from each other, meaning both terminals will start
and show the normal main screen. At that time the systems are already in cluster
mode.
Step 4:
Set a common operating mode:
▬
Master-device: => Unit Parameter => Cluster Mode
▬
After a short time you can choose between parallel and serial operation
The systems are now in a common operating mode and are operated exclusively via the interface or dis-
play of the master device. On the terminal of the slave device, the display shows: "This device is in slave
mode".
Fig. 59 Changing to cluster operation mode