Comtech EF Data CRS-500, Инструкция по установке и эксплуатации

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CRS-500 1:N Redundancy System
Revision 4
Serial Interface Operation 10–6 MN-CRS-500
10.2.5.5.1 Controller-to-Target Rules
From Controller-to-Target, the permitted qualifiers are “=” or “?” (ASCII codes 61 or 63):
= (ASCII code 61)
This qualifier is the Assignment Operator (AO). It means that the parameter defined by the preceding byte should be set to the value of the
argument(s) that follow it. For example: <0000/BKH=12{CR} means “set the Backup Holdoff time to 12 seconds.”
? (ASCII code 63)
This qualifier is the Query Operator (QO). It means that the Target should return the value of the parameter(s) defined by the preceding
byte. For example: <0000/BKH?{CR} means “query the value of the current Backup Holdoff time setting.”
10.2.5.5.2 Target-to-Controller Rules
From Target-to-Controller, the Target transmits the symbol =, ?, !, #, *, or ~ (ASCII codes 61, 63, 33, 35, 42, or 126) to the Controller:
= (ASCII code 61)
“=” displays in two ways:
1. If the Controller sends a command to set a parameter’s value, and the parameter value is valid, the Target accepts the command
by replying with no message arguments. For example: >0000/BKH={CR}{LF}
2. If the Controller sends a query to a Target, the Target responds with the configured setting. For example, the query
<0000/BKH?{CR} means “query the current value of the Backup Holdoff setting” – the Target responds with
>0000/BKH=12{CR}{LF}, where “12” represent the Backup Holdoff time setting, in seconds.
? (ASCII code 63)
“?” displays if the Controller sends a command to set a parameter to a particular value, and that value is not valid, the Target rejects the
command by echoing the instruction code, with no message arguments, followed by this character. For example: >0000/BKH?{CR}{LF}.
This indicates that there was an error in the instruction code argument sent by the Controller.
! (ASCII code 33)
“!” displays when the Controller sends a command that the Target does not recognize. The Target rejects the command by echoing the
invalid instruction code, followed by this character. For example: >0000/XYZ!{CR}{LF}