Manual

Message Summary 2-1
2. Message Summary
Another entry has been added to the Notes column of the following indicating FmNT
application involvement. See [RefGWGEMUser] Table 14 and Table 15
Host/Equipment Primary Messages.
Key for Notes Column:
* First line indicates FmNT application requirements.
* E = GEM extensions.
* N = non-GEM or older GEM compatibility
2.1 Host to Equipment
This section describes primary SECS messages sent by the Host, and the associated
reply messages from the Equipment.
The column headed "CState" in the table below indicates the control state the
Equipment must be in to accept the message. The current value of the Equipment
Control State can be found in variable CONTROLSTATE (vid 4). Possible values
for this column are as follows:
Table 2-1 Control State Values
Value State
1 Off-Line/Equipment Off-Line
2 Off-Line/Attempt On-Line
3 Off-Line/Host Off-Line
4 On-Line/Local
5 On-Line/Remote
Unlawful messages sent to the Equipment while Control State is Off-Line (1, 2, or 3)
will be replied to with a SnF0 message. Thus, the Host will only ever see values of 4
or 5 for CONTROLSTATE.
Refer to Table 122 - Host to Equipment Messages in section 7 for further message
detail.