66
b)
Click the message configuration button (“…”) in the MSG instruction. The “Message
Configuration” window will open. Refer to Figure 61.
Figure 61: MSG Instruction Configuration
c)
“Configuration” tab settings:
i)
Change the “Message Type” to “CIP Data Table Read”.
ii)
In the "Source Element” field, enter the read tag you wish to access (refer to section
9.2.9). In this example, we will be reading a total of 21 parameters beginning at
parameter 01.01 (output frequency monitor).
iii) Enter the “Number Of Elements” to read. In this example, we will read 21 parameters.
iv) For the Destination Element, select “data_array”.
d)
“Communication” tab settings (refer to Figure 62):
Figure 62: Setting the Communication Path
i)
Enter the Path to the interface card. A typical path is formatted as
“
Local_ENB,2,target_IP_address
”, where:
•
Local_ENB
is the name of the 1756-ENBx module in the local chassis (we
named ours “EIP” in section 9.2.10),
•
2
is the Ethernet port of the 1756-ENBx module in the local chassis, and
•
target_IP_address
is the IP address of the target node.
In our example, this path would be entered as “EIP,2,192.168.16.100”.
ii)
If “Cache Connections” is enabled (checked), the connection remains open after
transmission. If disabled (unchecked), the connection is opened before and closed
after every transmission. For efficiency, it is recommended to enable “Cache
Connections”.