3-10
Input and Output Functions
BE1-951
Returning an Output Contact to Logic Control
When the output logic has been overridden and the contact is held in an open or closed state, it is necessary
to
manually return the output to logic control. Outputs are returned to logic control through screen 2.4.1 of
the HMI. An L is entered in the field of the contact that is to be returned to logic control. Outputs are
returned to logic control through a communication port by using the CS/CO-OUTn=L (control select/control
operate-output contact n=logic control) command.
CS/CO-OUT Command
Purpose:
Controls or reads output selection/operation.
Syntax:
CS/CO-OUT<x>[=<mode>]
Comments:
n = output number 1, 2, 3, 4, 5, or A
mode = 0, 1, P, L, ENA, or DIS
The output control commands require the use of select-before-operate logic. First, the command must be
selected using the CS-OUT command. After the command is selected, there is a 30 second window during
which the CO-OUT control command can be entered. The control selected and operation selected syntax
must match exactly or the command will be blocked. If the operate command isn’t entered within 30
seconds of the select command, the operate command will be blocked. An error message is returned when
a control command is blocked.
Output control commands are acted on immediately except when the ENA and DIS modes are used. ENA
and DIS output control command changes aren’t executed until saved with the EXIT command. Output
control status is saved in non-volatile memory and is maintained when relay operating power is lost.
CS/CO-OUT Command Examples
1.
Enable the output control feature.
>CS-OUT=ENA
OUT=ENA SELECTED
>CO-OUT=ENA
OUT=ENA EXECUTED
(NOTE: Not effective until EXIT with SAVE(Y).)
2.
Test all outputs by pulsing momentarily.
>CS-OUT=P
OUT=P SELECTED
>CO-OUT=P
OUT=P EXECUTED
3.
Disable the trip output (OUT1) by holding it at logic 0.
>CS-OUT1=0
OUT1=0 SELECTED
>CO-OUT1=0
OUT1=0 EXECUTED
4.
Return OUT1 to logic control.
>CS-OUT1=L
OUT1=L SELECTED
>CO-OUT1=0
OUT1=L EXECUTED
Retrieving Output Logic Override Status
The status of the output contact logic override control can be viewed at HMI screen 1.4.3. HMI screen 2.4.1
is used for output control but can also display the current status. Output logic status can also be viewed
using the RG-STAT (report general-status) command. An L indicates that the state of the output is controlled
by logic. A 0 or 1 indicates that the logic has been overridden and the contact is held open (0) or closed (1)
state. A P indicates that the contact is being pulsed and will return to logic control automatically. See
Section 6,
Reporting and Alarm Functions, General Status Reporting for more information.
