EC3-33x Coldroom Controller with EX5
User Manual
EC3-33x
A.6.5.063E - Rev 4
18
Emerson Electric GmbH & Co - ALCO CONTROLS - Heerstr. 111 - D-71332 Waiblingen - Germany - Tel.: ..49 (0) 7151 509 0 - Fax: 49 (0) 7151 509 200
Compressor Object
The compressor object controls the behavior of the compressor. If the object is disabled the compressor will be turned off , no network
variable updates will be performed and the object will no react on any input nv update.. The status information is send by the nvoStatus of
the node object. If a failure is detected, the “in_alarm” bit in the status structure will be set, if the compressor is in manual control, the
“manual control” bit is set..
Network Variables
Variable Type
Name
Type
Meaning
SNVT_lev_disc
nvoCompState
O
Status of the compressor
SNVT_switch
nviForcedComp
I
Manual control of Compressor, state = 1 to activate manual control, value = 0
compressor off, value =1 compressor on
SNVT_state
nvoCompStatus
O
Status of the compressor object
SNVT_lev_disc
nviCompSafety
Failure input for compressor safety, ST_ON = compressor off and locked
UNVT_COMP
nciCompCnfg
C
Configuration parameters of the fan object
The network variable “nvoCompStatus” will represent the status of the compressor object.
Bit No.
Description
0
Compressor off / on
1
Off function inhibit
2
On function inhibit
3
Pump down delay
4
Manual control
5
External failure
Configuration Parameters
Compressor ( Single stage compressor control )
UNVT_COMP
Code
Description
SNVT
Name
Var. type Unit Min Max Default Res. IR Kb Lon
0
c0
Delay for first start of compressor
unsigned short
DlyFirstStart
C
min
0
15
0
y
y
y
1
c1
Time between two compressor starts
unsigned short
CompCycle
C
min
0
15
0
y
y
y
2
c2
Minimum stop time of compressor
unsigned short
CompStop
C
min
0
15
0
y
y
y
3
c3
Minimum run time of compressor
unsigned short
CompRun
C
min
0
15
0
y
y
y
Total 4 bytes
Alarm Messages
Alarm messages will be send by the “nvoAlarm” of the node object
.
Condition
SNVT #
Alarm Value
Message
Priority
External failure occurs
22
nviCompSafety
AL_ALM_CONDITION
PR_LEVEL_3
External failure disappears
22
nviCompSafety
AL_NO_CONDITION
PR_LEVEL_3
