EMERSON SLS1508 KJ2201X1-BA1 12P3162X112 module

Event Command Blocks (2000 to 2029) Use blocks 2000 to 2029 to modify the Modbus Command parameters in the SLC’s register files dynamically without the need to modify and reload the Configuration file MNET.CFG. Event Request description (Write Block) Event Command blocks send Modbus TCP/IP commands directly from the ladder logic to one of the Clients on the module. The following table describes the format for these blocks.

Use the parameters passed

 with the block to construct the command. The IP Address for the node to reach on the network is entered in four registers (1 to 4). Each digit of the IP address is entered in the appropriate register. For example, to interface with node 192.168.0.100, enter the values 192, 168, 0 and 100 in registers 1 to 4.  The Service Port field selects the TCP service port on the server to connect. If the parameter is set to 502, a standard MBAP (Modbus API for network communications) message will be generated. All other service port values will generate a Modbus command message encapsulated in a TCP/IP packet.  The Internal DB Address parameter specifies the module’s database location containing the data to transfer.

Event Response description (Read Block) 

When the module receives the block, it will process it and place it in the command queue. The third word of the block can be used by the ladder logic to determine if the command was added to the command queue of the module. The command will only fail if the command queue for the client is full (16 commands for each queue). The following table describes the format for this block.

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