Function 16 - Write Multiple Registers; Function 08 - Loop-Back Communications Test - Satec PM130 Reference Manual

Response
The normal response is the retransmission of the write request.

3.4 Function 16 - Write Multiple Registers

This request allows the user to write the contents of multiple contiguous registers to a single
data table where registers can be written.
Request
Instrument Function
Address (16)
1 byte 1 byte
Data Word 1 ...
2 bytes ...
Starting Address Address of the first register to be written
Word Count The number of contiguous words to be written
Byte Count The number of bytes to be written
Response
Instrument Function
Address (16)
1 byte 1 byte

3.5 Function 08 - Loop-back Communications Test

The purpose of this request is to check the communications link between the specified
instrument and PC.
Request
Instrument Function
Address (08)
1 byte 1 byte
Diagnostic Code Designates action to be taken in Loop-back test. The protocol
supports only Diagnostic Code 0 - return query data.
Data Query data. The data passed in this field will be returned to the
master through the instrument. The entire message returned will
be identical to the message transmitted by the master, field-per-
field.
Response
Instrument Function
Address (08)
1 byte 1 byte
The normal response is the re-transmission of a test message.
Starting Word
Address Count
2 bytes 2 bytes
... ... Data Word N
... ... 2 bytes
Starting Word
Address Count
2 bytes 1 word
Diagnostic Data
Code (0)
2 bytes 2 bytes
Diagnostic Data
Code (0)
2 bytes 2 bytes
Byte
Count
1 byte
Error Check
2 bytes
Error
Check
2 bytes
Error
Check
2 bytes
Error
Check
2 bytes
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