Emerson Vilter Vission 20/20 Operation And Service Manual page 334

Appendix D • Vission 20/20 Communication Table
• Commands: Start Command – starts the compressor in the currently active control mode / auto sequencing. When
this command is read, 1 is returned if compressor is in starting mode or waiting mode
• Compressor Scheduling: Enable/Disable – if a valid schedule has not been defined (on screen or through comm),
this command will fail.
• Compressor Scheduling: Control Mode ENUM – 0 = Unscheduled
When enabling the schedule, allow for a timeout of at least 3 seconds for the schedule to be verified as valid.
1 = Suction Pressure SP1
2 = Suction Pressure SP2
3 = Process Temp. SP1
4 = Process Temp. SP2
5 = Discharge Pressure SP1
6 = Discharge Pressure SP2
Note: If the control mode being set isn't active in the configuration, the command will result in error. This value is al-
lowed to be changed only when the schedule is enabled
Compressor Scheduling: Hour INT – This value is allowed to be changed only when the schedule is disabled
Compressor Scheduling: Minute INT – This value is allowed to be changed only when the schedule is disabled
D - 36
Vission 20/20 • Operation and Service Manual • Emerson • 35391SC 2.7