GE 369-C100 relay card

MB Address in Device This parameter specifies the starting Modbus register or bit address in the Server to be used by the command. Refer to the documentation of each Modbus Server device for the register and bit address assignments valid for that device. The Modbus Function Code determines whether the address will be a registerlevel or bit-level OFFSET address into a given data type range. The offset will be the target data address in the Server minus the base address for that data type. Base addresses for the different data types are:  00001 or 000001 (0x0001) for bit-level Coil data (Function Codes 1, 5, and 15).

If the documentation for a particular Modbus Server device lists data addresses in hexadecimal (base16) notation, you will need to convert the hexadecimal value to a decimal value to enter in this parameter. In such cases, it is not usually necessary to subtract 1 from the converted decimal number, as this addressing scheme typically uses the exact offset address expressed as a hexadecimal number.

Ethernet Configuration 

Use this procedure to configure the Ethernet settings for your module. You must assign an IP address, subnet mask and gateway address. After you complete this step, you can connect to the module with an Ethernet cable. 1 Determine the network settings for your module, with the help of your network administrator if necessary.Note: The gateway address is optional, and is not required for networks that do not use a default gateway.

2 Double-click the ETHERNET CONFIGURATION icon. This action opens the Edit dialog box.

3 Edit the values for my_ip, netmask (subnet mask) and gateway (default gateway). 

4 When you are finished editing, click OK to save your changes and return to the ProSoft Configuration Builder window

Setting Command Control Bits 

Toggle the CMD_BITS_CNTRL bit in the ladder logic (Rung 6 of LAD4 - CNTRL in the sample program) to execute the Modbus Commands as structured in the MNET.CFG file. This will cause continuous traffic on the Ethernet network with data flow as configured in MNET.CFG file. This rung also selects the Commands to enable as set by the Enabled bits in each word N50:21 through N50:50 representing each client.

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