CHAPTER 5: SETTINGS INPUTS/OUTPUTSL90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-3975OUTPUT H1a OPERATE — This setting specifies a FlexLogic operand to operate the ‘close coil’ of the contact. The relay seals-in this input to safely close the contact. Once the contact is closed and the RESET input is logic 0 (off), any activity of theOPERATE input, such as subsequent chattering, does not have any effect. With both the OPERATE and RESET inputs active(logic 1), the response of the latching contact is specified by the OUTPUT H1a TYPE setting.OUTPUT H1a RESET — This setting specifies a FlexLogic operand to operate the ‘trip coil’ of the contact. The relay seals-inthis input to safely open the contact. Once the contact is opened and the OPERATE input is logic 0 (off), any activity of theRESET input, such as subsequent chattering, does not have any effect. With both the OPERATE and RESET inputs active (logic1), the response of the latching contact is specified by the OUTPUT H1a TYPE setting.OUTPUT H1a TYPE — This setting specifies the contact response under conflicting control inputs; that is, when both theOPERATE and RESET signals are applied. With both control inputs applied simultaneously, the contact closes if set to“Operate-dominant” and opens if set to “Reset-dominant.”Figure 5-221: Contact input/output module type 4L contact 1 logicApplication example 1A latching output contact H1a is to be controlled from two user-programmable pushbuttons (buttons number 1 and 2). Thefollowing settings are applied.Program the Latching Outputs by making the following changes in the SETTINGS INPUTS/OUTPUTS CONTACTOUTPUTS CONTACT OUTPUT H1a menu (assuming an H4L module):OUTPUT H1a OPERATE: “PUSHBUTTON 1 ON”OUTPUT H1a RESET: “PUSHBUTTON 2 ON”Program the pushbuttons by making the following changes in the PRODUCT SETUP USER-PROGRAMMABLE PUSHBUTTONS USER PUSHBUTTON 1 and USER PUSHBUTTON 2 menus:PUSHBUTTON 1 FUNCTION: “Self-reset”PUSHBTN 1 DROP-OUT TIME: “0.00 s”PUSHBUTTON 2 FUNCTION: “Self-reset”PUSHBTN 2 DROP-OUT TIME: “0.00 s”Application example 2A relay, having two latching contacts H1a and H1c, is to be programmed. The H1a contact is to be a Type-a contact, whilethe H1c contact is to be a Type-b contact (Type-a means closed after exercising the operate input; Type-b means closedafter exercising the reset input). The relay is to be controlled from virtual outputs: VO1 to operate and VO2 to reset.Program the Latching Outputs by making the following changes in the SETTINGS INPUTS/OUTPUTS CONTACTOUTPUTS CONTACT OUTPUT H1a and CONTACT OUTPUT H1c menus (assuming an H4L module):OUTPUT H1a OPERATE: “VO1”OUTPUT H1a RESET: “VO2”OUTPUT H1c OPERATE: “VO2”OUTPUT H1c RESET: “VO1”
