RMG TME400, Operating Manual

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APPENDIX
MANUAL TME400-VCF · EN08 · July, 01 st 2021
109
B5 Reading the archive data via Modbus
Archive entries are accessible via Modbus. The command 14h "Read General Ref-
erence" is used for this. This command can be used to index the storage ranges of
the archives and the corresponding management headers (see document:
"Modicon Modbus Protocol; Reference Guide (PI-MBUS-300 Rev. J)")
The TME400 only supports the processing of a sub-request within one request.
The structure of the request string is as follows:
Byte Meaning
1 Device address
2 Function (14h)
3 Number of bytes (07h)
4 Reference type (00h)
5 File number (Hi)
6 File number (Lo)
7 Start index (Hi)
8 Start index (Lo)
9 Number of registers to be read (Hi)
10 Number of registers to be read (Lo)
11 CRC (Lo)
12 CRC (Hi)
The specified reference type in the request string is not checked in the TME400.
The following file number selects the archive or archive header to be read:
File number Archive type
1 Management header custody transfer parameter archive
2 Custody transfer parameter archive
3 Management header parameter archive
4 Parameter archive
5 Management header event archive
6 Event archive
7 Management header minutes archive
8 Minutes archive
9 Management header daily archive
10 Daily archive
11 Management header monthly archive
12 Monthly archive