5-342 L90 Line Current Differential System GE Multilin5.10 TESTING 5 SETTINGS55.10.3 FORCE CONTACT OUTPUTSPATH: SETTINGS TESTING FORCE CONTACT OUTPUTSThe relay contact outputs can be pre-programmed to respond to the test mode.If set to “Disabled”, the contact output remains fully operational. If operates when its control operand is logic 1 and willresets when its control operand is logic 0. If set to “Energized”, the output will close and remain closed for the entire dura-tion of the test mode, regardless of the status of the operand configured to control the output contact. If set to “De-ener-gized”, the output will open and remain opened for the entire duration of the test mode regardless of the status of theoperand configured to control the output contact. If set to “Freeze”, the output retains its position from before entering thetest mode, regardless of the status of the operand configured to control the output contact.These settings are applied two ways. First, external circuits may be tested by energizing or de-energizing contacts. Sec-ond, by controlling the output contact state, relay logic may be tested and undesirable effects on external circuits avoided.Example 1: Initiating test mode through user-programmable pushbutton 1For example, the test mode can be initiated from user-programmable pushbutton 1. The pushbutton will be programmed as“Latched” (pushbutton pressed to initiate the test, and pressed again to terminate the test). During the test, digital input 1should remain operational, digital inputs 2 and 3 should open, and digital input 4 should close. Also, contact output 1 shouldfreeze, contact output 2 should open, contact output 3 should close, and contact output 4 should remain fully operational.The required settings are shown below.To enable user-programmable pushbutton 1 to initiate the test mode, make the following changes in the SETTINGS TESTING TEST MODE menu: TEST MODE FUNCTION: “Enabled” and TEST MODE INITIATE: “PUSHBUTTON 1 ON ”Make the following changes to configure the contact inputs and outputs. In the SETTINGS TESTING FORCE CONTACTINPUTS and FORCE CONTACT OUTPUTS menus, set:FORCE Cont Ip 1: “Disabled”, FORCE Cont Ip 2: “Open”, FORCE Cont Ip 3: “Open”, and FORCE Cont Ip 4: “Closed”FORCE Cont Op 1: “Freeze”, FORCE Cont Op 2: “De-energized”, FORCE Cont Op 3: “Energized”,and FORCE Cont Op 4: “Disabled”Example 2: Initiating a test from user-programmable pushbutton 1 or through remote input 1In this example, the test can be initiated locally from user-programmable pushbutton 1 or remotely through remote input 1.Both the pushbutton and the remote input will be programmed as “Latched”. Write the following FlexLogic equation:Set the user-programmable pushbutton as latching by changing SETTINGS PRODUCT SETUP USER-PROGRAMMABLEPUSHBUTTONS USER PUSHBUTTON 1 PUSHBUTTON 1 FUNCTION to “Latched”. To enable either pushbutton 1 or remoteinput 1 to initiate the Test mode, make the following changes in the SETTINGS TESTING TEST MODE menu:TEST MODE FUNCTION: “Enabled” and TEST MODE INITIATE: “ VO1 ” FORCE CONTACT OUTPUTSFORCE Cont Op 1:DisabledRange: Disabled, Energized, De-energized, FreezeMESSAGE FORCE Cont Op 2:DisabledRange: Disabled, Energized, De-energized, FreezeMESSAGE FORCE Cont Op xx:DisabledRange: Disabled, Energized, De-energized, Freeze
