EC3-33x Coldroom Controller with EX5
User Manual
EC3-33x
A.6.5.063E - Rev 4
12
Emerson Electric GmbH & Co - ALCO CONTROLS - Heerstr. 111 - D-71332 Waiblingen - Germany - Tel.: ..49 (0) 7151 509 0 - Fax: 49 (0) 7151 509 200
NETWORK VARIABLES
Node Object
The node object includes all network variables which are necessary for the general communication with the node.
Network Variables
Variable Type
Name
Type
Meaning
SNVT_obj_request
nviRequest
I
Control and status request for one or all objects within the node
SNVT_obj_status
nvoStatus
O
Answer of a control or status request
SNVT_time_stamp
nviTimeSet
I
Set of internal software clock
SNVT_alarm
nvoAlarm
O
Alarm output for all objects within the node
SNVT_elapsed_tm
nciMaxSendT
C
Timer to send node and object status automatically
SNVT_elapsed_tm
nciMinSendT
C
Timer to delay network variable updates
The implemented control and status requests which can be accessed by “nviRequest” are :
•
RQ_NORMAL
•
RQ_DISABLED
•
RQ_UPDATE_STATUS
•
RQ_SELFTEST
•
RQ_UPDATE_ALARM
•
RQ_REPORT_MASK
•
RQ_OVERRIDE
•
RQ_ENABLE
•
RQ_RMV_OVERRIDE
•
RQ_CLEAR_STATUS
•
RQ_CLEAR_ALARM
•
RQ_ALARM_NOTIFY_ENABLED
•
RQ_ALARM_NOTIFY_DISABLED
•
RQ_MANUAL_CTRL
•
RQ_REMOTE_CTRL
•
RQ_PROGRAM
RQ_NORMAL -
This requested object is set to normal operation. If the object was disabled, output network variable will be updated,
the object will reacted on updates off input network variables. If the object was in override, the override mode will be switched off. An
RQ_NORMAL request to the node object will bring all objects in the node to normal operation.
RQ_DISABLED -
This requested object is disabled, output network variable of the object will not longer be updated. The object will
not reacted on input network variable updates. The disable status is object dependent. An RQ_DISABLED request to the node object
will bring all objects of the node in the disabled mode.
RQ_UPDATE_STATUS -
The output network variable “nvoStatus” is updated with the current status of the requested object. An
RQ_UPDATE_STATUS request to the node object will show in the network variable “nvoStatus” the logical or all status bits of all
objects in the node.
RQ_SELFTEST –
The behavior is object dependent.
RQ_UPDATE_ALARM –
The network variable “nvoAlarm” is updated with the latest alarm message from the requested object.
RQ_REPORT_MASK -
The output network variable “nvoStatus” is updated with the possible status bits of the requested object
RQ_OVERRIDE -
The behavior is object dependent.
RQ_ENABLE -
This requested object is set to normal operation. If the object was disabled, output network variable will be updated,
the object will reacted on updates off input network variables. If the object was in override, the object will stay in override mode.
RQ_RMV_OVERRIDE -
If the object was in override, the override mode will be switched off.
RQ_CLEAR_STATUS –
The output network variable “nvoStatus” will be cleared.
RQ_CLEAR_ALARM –
The behavior is object dependent.
RQ_ALARM_NOTIFY_ENABLED -
The behavior is object dependent.
RQ_ ALARM_NOTIFY_DISABLED -
The behavior is object dependent.
RQ_MANUAL_CTRL –
The behavior is object dependent.
RQ_REMOTE_CTRL –
The behavior is object dependent.
RQ_REMOTE_PROGRAM –
The behavior is object dependent
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