Additional information
● Section "Using a wizard for CFU configuration (Page 72)"
● Section ""Expert Functions" dialog (Page 76)"
10.12 CFU PA: Using service interface
Enabling service interface
If using the service interface is required, you must activate the parameter in HW Config.
You can find information on this in section "CFU PA: Assigning parameters to the PROFIBUS
PA Master (parameter overview - FB M) (Page 97)".
Requirements
● The port for the service interface is enabled in HW Config.
● The field device was last connected to this CFU PA in process mode.
● The field device is connected to the service port.
● The field device was detected correctly at the service port. The green LED on the fieldbus
connection (service port) lights up.
Diagnostics
You can find information on the LED displays in section "Diagnostics via LED displays
(Page 107)".
Calibrating field devices
A diagnostic interrupt is generated for the original fieldbus connection of the CFU PA. This
alarm indicates that the field device has been routed through the service port.
In the commissioning wizard of the CFU PA, all dialogs in which the fieldbus connections are
listed show that the field device previously connected to another port is currently connected to
the service port.
1. Calibrate the field device.
Set any required correction parameters in the field device.
2. Disconnect the field device from the service port.
3. Connect the field device to the original fieldbus connection of the CFU PA in the system.
4. Activate any separate process functions.
Servicing and maintenance
10.12 CFU PA: Using service interface
SIMATIC CFU
124 Commissioning Manual, 08/2019, A5E39252870-AD
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