Comtech EF Data LCS-4 - Manual (Page 69)

LCS-4 L-Band Combiner Switch Revision 1
Remote Control Operation MN/LCS4.IOM
2. From Target to Controller, the only permitted values are:
= (ASCII code 61)
? (ASCII code 63)
! (ASCII code 33)
* (ASCII code 42)
# (ASCII code 35)
They have these meanings:
The = code (target to controller) is used in two ways:
• First, if the controller has sent a query code to a target (for example BSA?,
meaning ‘is BUC A power supply on or off?), the target would respond with,
BSA=x, where x represents the state in question, 1 being on and 0 being off.
•
Second, if the controller sends an instruction to set a parameter to a particular
value, then, providing the value sent in the argument is valid, the target will
acknowledge the message by replying with BSA= (with no message arguments).
The ? code (target to controller) is only used as follows:
• If the controller sends an instruction to set a parameter to a particular value, then,
if the value sent in the argument is not valid, the target will acknowledge the
message by replying with (for example) with BSA? (with no message
arguments).
• This indicates that there was an error in the message sent by the master.
The * code (target to controller) is only used as follows:
•
If the controller sends an instruction to set a parameter to a particular value, then,
if the value sent in the argument is valid, but the modem will not permit that
particular parameter to be changed at that time, the target will acknowledge the
message by replying with (for example) with BSA* (with no message
arguments).
The ! code (target to controller) is only used as follows:
• If the controller sends an instruction code which the target does not recognize,
the target will acknowledge the message by echoing the invalid instruction,
followed by the ! character. Example: XYZ!
The # code (target to controller) is only used as follows:
• If the controller sends an instruction code which the target cannot currently
perform because of hardware resource issues, the target will acknowledge the
message by echoing the invalid instruction, followed by the BSA# character.
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