ABB 2600T Series Operating Instruction

Also see for 2600T Series: Short form instruction manual Operating instruction Operating instructions Operating instructions Operating instruction

ABB 2600T Series Operating Instruction Manual pdf 35 page image

- 35 -The secondary electronic is shown in the figure. There are 4 dip switches located on the secondary electronics as indicated below;they are used for settings when integral digital display is not available.ADDENDUM USE OF HARDWARE LINKS ON THE SECONDARY ELECTRONIC1 2103 4Switches 1 and 2 are used for Electronics or Transducer replace; Switch 3 is for Write Protect mode selection; Switch 4 is for Up/Down Scale selection. Here below a description of the operations.REPLACEUsually switches 1 and 2 are down in "0" position.They are moved when a replace operation is required.Switch 1 up in "1" position is required before power up the transmitter, when a replaceis being performed. Switch 2 down in "0" position allows the replace of the transducer.Switch 2 up in "1" position allows the replace of the secondary electronics.It must be moved in this position, when electronics replace is being performed, beforepower up the transmitter.AFTER ANY REPLACE OPERATION IT IS RECOMMENDED TO MOVEDOWN IN "0" POSITION THE RELEVANT SWITCHES.WRITE PROTECT modeWith the switch 3 up in "0" position the write protect mode is active.It is a way to protect the device from any change:configuration data and parameters cannot be modified.UP/DOWN SCALE modeThe switch 4 defines the fail safe output condition in case of transmitter failure:- In the ON position the output is Down (below 4 mA)- In the OFF position the output is UP (above 20 mA)1 2101 2101 210310410NOTE: Typically the Up/Down scale mode is activated when there is a failure in the physical elements of the sensorand on the electronics of the device, and more precisely:1) Values in the sensor database are corrupted; 2) EEprom of Primary Electronic (sensor) is failed;3) Values of Primary variables are out of limits; 4) Digital to analog converter (DAC) circuit is out of range.5) ASIC - (Integrated circuit) of sensor is failed. 6) ASIC - (Integrated circuit) of electronics is failed.✶Note: After anyreplace operation a "pre-startup acceptance test"must be performed.✶