Sullair WSPC - Monitoring Modbus Communications; Reading and Writing Specific Registers

WSPC USER INTERFACE Part 2: Administrator Level
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6.6.1 Monitoring Modbus communications
Three modes of monitoring may be selected by clicking the radio button. When
monitoring, the WSPC request will always be shown in the “Command” data
window in hex form. The WS data will be shown in the lower window in either
Hex or Decimal format.
Off – Stops monitoring, but continues to display the most recent communication.
Continuous – monitors the normal WSPC communication with the controller.
Step – Allows the Administrator to select a given block of data for monitoring.
See figure 6.17. To use step monitoring:
1. Click Step radio button in the Mode box.
2. Use the drop-down list to select a parameter type. Options are User
Inputs, Admin Inputs, User Holding, and Admin Holding.
3. Use the drop down list to select a block of data of that type. These will be
in blocks of up to 50 registers.
4. Click the “Step” button to refresh the data.
Figure 6.17 Modbus Monitoring
6.6.2 Reading and writing specific registers
The Administrator is also able to select a specific register for monitoring or
changing. Always use the decimal format when doing this. See figure 6.18.
To read a register:
1. Click the “Decimal” format.