CHAPTER 5: SETTINGS TESTINGB90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-2035• If set to “Open,” the input is forced to report as opened (Logic 0) while the operand selected by TEST MODE FORCINGsetting is On, regardless of the voltage across the input terminals. While the selected operand is Off, the input behavesas it does when in service.• If set to “Closed,” the input is forced to report as closed (Logic 1) while the operand selected by TEST MODE FORCINGsetting is On regardless of the voltage across the input terminals. While the selected operand is Off, the input behavesas it does when in service.5.9.4 Force contact outputsSETTINGS TESTING FORCE CONTACT OUTPUTSThe force contact outputs feature provides a method of performing checks on the function of all contact outputs.While in Forcible test mode, the relay contact outputs can be pre-programmed to respond in the following ways:• If set to “Normal,” the contact output remains fully operational. It operates when its control operand is logic 1 andresets when its control operand is logic 0.• If set to “Energized,” the output closes and remains closed while the operand selected by the TEST MODE FORCINGsetting is On, regardless of the status of the operand configured to control the output contact. While the selectedoperand is Off, the output behaves as it does when in service.• If set to “De-energized,” the output opens and remains opened while the operand selected by the TEST MODE FORCINGsetting is On, regardless of the status of the operand configured to control the output contact. While the selectedoperand is Off, the output behaves as it does when in service.• If set to “Freeze,” the output retains its position at the instant before the TEST MODE FUNCTION was Forcible and theoperand selected by the TEST MODE FORCING setting was On, regardless of later changes in the status of the operandconfigured to control the output contact. While the selected operand is Off, the output behaves as it does when inservice.On restart, the TEST MODE FORCING setting and the force contact input and force contact output settings revert totheir default states. FORCE CONTACT OUTPUTS FORCE Cont Op 1: NormalRange: Normal, Energized, De-energized, Freeze FORCE Cont Op 2: NormalRange: Normal, Energized, De-energized, Freeze FORCE Cont Op xx: NormalRange: Normal, Energized, De-energized, FreezeOn restart, the TEST MODE FORCING setting and the force contact input and force contact output settings revert totheir default states.
