
Message Packet Formats
Chapter 5
5-35
Shutdown Request
This command is used by the computer to ask the 1775-KA module to
initiate either a PLC-3 shutdown (if the computer has download
privileges) or a freeze on file allocations (if the computer has upload
privileges). The computer cannot issue this command until it has
successfully transmitted an upload or download request to the 1775-KA
module.
Reply
Format:
(EXT STS Byte Optional)
B.
Format When Reporting an Error
TNSSTSCMD
4F
SRCDST
TNSSTSCMD
4F
SRCDST EXT
STS
A.
Format When Successful Execution
Command Format:
TNSSTSCMD
0F
SRCDST FNC
07
Upload Request
This command is used by the computer to inform the 1775-KA module
that it wants to do an upload. If the module grants the upload privilege,
the computer may begin issuing physical reads. If a different station
already has the upload privilege, the second station is denied the privilege.
The function code is 6.
Reply
Format:
(EXT STS Byte Optional)
B.
Format When Reporting an Error
TNSSTSCMD
4F
SRCDST
TNSSTSCMD
4F
SRCDST EXT
STS
A.
Format When Successful Execution
Command Format:
TNSSTSCMD
0F
SRCDST FNC
06
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