Hardware Settings - ABB TTH300 Operating Instruction

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8.5.2

Hardware settings

PROFIBUS PA and FOUNDATION Fieldbus H1 transmitters have two switches on their upper
side, next to the LC display interface.
Switch 1 activates write protection for PROFIBUS PA and FOUNDATION Fieldbus transmitters.
In the future, this option will also become available for HART transmitters.
Switch 2 supports the FOUNDATION Fieldbus request for a hardware release for ITK
simulation.
Fig. 24
Switches S1 and S1 can be accessed via hinged cover.
Switch 1 (S1)
Local write protection ("Hardware")
Setting
Off
On
Switch 2 (S2)
Simulation release
Setting
Off
On
Important
•
•
OI/TTH300-EN
Configuration via the LC display with control buttons
Factory setting: Both switches "Off" (device not write-protected and simulation blocked)
With PROFIBUS PA devices, switch 2 must always be in the "Off" position.
Function
Local write access enabled
Local write access disabled
Function
Simulation blocked
Simulation enabled
TTH300
A00256
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