Manual

SECS Scenarios 5-13
5.4.3 Host Sends Remote Command
Assumption: Control State is On-Line and Remote.
Table 5-28 SECS Messages Host Sends Remote Command
Step SECS Message Description
1. H -> E S2F41
[W]
The Host sends the command. The W-bit in this message bay be
either 0 or 1.
2. H <- E S2F42 If the W-bit was 1, the Equipment acknowledges the command. If
the Equipment cannot perform the command, the acknowledge
code in this message is non-zero. If the command can be
completed "immediately", the command is performed and the
acknowledge code in this message is 0. Otherwise, if the
command takes a significant amount of time to complete, the
acknowledge code is 4. Successful completion of a command
may trigger one or more events.
5.4.4 Equipment Rejects Host Command
Assumption: Control State is Local and On-Line
Table 5-29 SECS Messages Equipment Rejects Host Command
Step SECS Message Description
1. H -> E S2F41 [W] The Host sends the command. The W-bit in this message may
be either 0 or 1.
2. H <- E S2F42 If the W-bit in S2F41 is 1, the Equipment acknowledges the
command. The acknowledge code in this message is 64 (Control
State is incorrect). If the W-bit is 0, this message is not sent. In
either case, the Equipment does not perform the command.