IBM Modbus Plus - Manuals

Configuration 45 3 Configuration When you download a driver to the X-Link, you must set configurationparameters to control the interface between the driver and the requiredhardware. This section details the configuration parameters for the ModbusPlus driver.

Modbus Plus X-Link Driver User’s Guide 46 3.1 Configuration Parameters The Modbus Plus driver is distributed in the file SA85.DRV. Once theSA85.DRV is loaded into the X-Link, the following parameters are required: Card Segment The memory address for the SA85 card. The card requires 2Kof memory in th...

Mappings 47 4 Mappings Once the X-Link has been loaded, you can create mappings to transfer datafrom one network to the other. This section outlines the mapping optionssupported by the Modbus Plus driver. For information on what mappings are or how they work, please refer to the X-Link User's Guide ...

Modbus Plus X-Link Driver User’s Guide 48 4.1 Data Types and Lengths The Modbus Plus Driver supports three X-Link data formats; Bits andIntegers, as well as Floats. The Modbus Plus protocol does not support floating point. The driver willtruncate any floating point numbers before transmission, and e...

Modbus Plus X-Link Driver User’s Guide 50 4.3 Destination Accesses The Modbus Plus driver supports three possible destination accesses. The first destination defines a local address which allows any device on theModbus Plus network to read the data from the X-Link. This type ofdestination can be use...

Mappings 51 4.4 Local Addresses When a mapping is created which allows a PLC to access data within theX-Link, a local address dialog box must be completed. The informationrequired to complete a local address definition is the class of data to access(Coils, Input Status, Input Registers or Holding Re...

Troubleshooting 53 5 Troubleshooting If you cannot communicate with your X-Link, refer to the troubleshootingsection in the X-Link User's Guide. If you can communicate with yourX-Link, but cannot monitor the status of your Modbus Plus driver, you mostlikely have the memory address set incorrectly. R...

Specification 55 6 Specification 6.1 Driver CMOS Storage Requirements Driver Code and Parameters 16 Kbytes Each Global Data Read Address 4 bytes Each Global Data Write Address 3 bytes Each Internal Address 5 bytes Each External Address 10 bytes Each Status Counter Address 2 bytes