Hardware Settings; Switching Hardware; Write Protection On/Off - Endress+Hauser Proline Promass 84 MODBUS RS485 Operating Instructions Manual

Operation
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5.7

Hardware settings

Warning!
In the case of explosion-protected equipment, observe a cooling or discharge time of 10 minutes
before opening the device.
5.7.1 Switching hardware write protection on/off
A jumper on the I/O board provides the means of switching hardware write protection on or off.
When the write protection is switched on, it is not possible to write to the device parameters via
MODBUS RS485.
Warning!
Risk of electric shock. Exposed components carry dangerous voltages.
Make sure that the power supply is switched off before you remove the cover of the electronics
compartment.
1. Switch off power supply.
Remove the I/O board → ä 87
2.
3. Configure the hardware write protection accordingly with the aid of the jumpers (see Figure).
4. Installation is the reverse of the removal procedure.
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Fig. 33: Switching write protection on and off with the aid of a jumper on the I/O board
1 Jumper for switching write protection on and off
1.1 Write protection switched on = it is not possible to write to the device parameters via MODBUS RS485
1.2 Write protection switched off (factory setting) = it is possible to write to the device parameters via MODBUS RS485
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U T
T P
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P U
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P U
I N
Proline Promass 84 MODBUS RS485
1.1
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1.2
Endress+Hauser
a0002598