40
4.2.1 COMMAND CODES
ASCII Character String
Function
ACS
Active Converter Status
ALR
System Fault Status
ATT
Converter Position Attenuation
CLK Internal
Calendar/Clock
EAD
All Ethernet Parameters
EQU Gain
Equalization
FRQ
Converter Position Frequency
IFS
Converter Position IF Frequency
LOG Event
Log
MNB Unit
Model
MOD
Unit Model Number
NAM Unit
Title
POL Polarization
PRI Chain
Priority
RED Redundancy
Mode
SER
Unit Serial Number
SLP
Backup Path Slope
STA System
Status
SWP
Transfer Switch Position
SWT
Switch Module Type
VER
Firmware Title and Version
*nn
Converter Pass-Through Command
4.2.2 ERROR CODES (SERIAL PROTOCOL ONLY)
ASCII Character
Function
a
Command not recognized
b
Illegal parameter or parameter out of range
c
Unit in Local mode
d Busy
4.2.3 ACTIVE CONVERTER STATUS = ACS
The SET command requires twenty-six parameters. The set form of this command is
used to enable or disable the NSU-Converter Serial Link for each position in the
redundancy chain. A chain position can be deactivated with the SET command. A
chain position CANNOT be activated with a set command. To activate a chain position,
the form-c contacts must be connected to the NSU, the NSU must establish
communication with the switch module in the chain and then the RS485 connection
between the NSU and the converter must be established unless the NSU-Converter
Serial Link has been disabled.
Regardless of whether the unit is an NSU1, NSU2 or NSUN the set and query forms of
the ACS command requires all 26 parameters. For an NSU1 and NSU2 if a change to a
serial link or chain position outside the range of the NSU is attempted the NSU will
respond with “b”: illegal parameter or parameter out of range. The acceptable range for
an NSU1 is the Backup and Primary converter one positions. For an NSU2 the