E

Manual Mode

This section explains how to use Manual mode to manually poll the selected Micro PLC:

HReading one word of input, output, or register data

HSetting an output low or high

HWriting a single register

HCreating or changing a register file

HWriting data to a register file

HCreating a report of exceptions

HReporting the device type

Manual mode is useful to determine the mapping of the Micro PLC, the integrity of the interconnects, and other factors before creating an auto polling screen.

Data Format

In Manual mode, both transmitted data and received data are displayed in hex format. In addition, both transmitted and received data displayed show header and checksum information. Received data also explicitly shows the ªdataº from the response. All returned data is 16 bits.

If the response has a bad checksum, wrong target ID, or wrong function number, this is displayed before the data is shown. If no response is forthcoming (for example, if there is an improperly wired cable), then ªBad Checksumº is shown along with no actual received data.

GFK-0804B

Appendix E Data Acquisition, Logging, and Display Program

E-9

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GE GFK-0804B manual Manual Mode, Data Format