3. Feedback voltage evaluation
Voltage range definition: When L+supply voltage is greater than 6V, the feedback voltage status is included in the input data; When 6V<feedback voltage ≤ 12V or>12V, corresponding to different system fault scenarios (such as cable crossing), the fault type can be determined by reading the bit status through the user program.
Evaluation scenario: Only when the L+power supply is safely disconnected (as indicated by the safety relay status), the feedback voltage bit=1 (6-12V or>12V) can be used as a fault diagnosis basis to locate system circuit abnormalities.

Technical specifications and installation
(1) Mechanical specifications
Parameter Value
Dimensions (width x height x depth) 7mm x 117mm x 36mm
Weight (approximately) 19g
The fuse supports three 5 × 20mm backup fuses
(2) Installation and Connection
Installation method: Suitable for ET200SP standard installation rails, no additional fasteners required, quick installation through rail buckles, compatible with other ET200SP modules in terms of layout.
Connection requirements: No independent I/O terminals, only connected to the system through the backplane bus, no additional wiring required, automatically connected to the system after installation.
Diagnosis and maintenance
(1) Diagnostic alarm processing
Diagnosis alarm type error code reason solution
Invalid firmware version 1BH server module firmware version<V1.1.1, incompatible with the current system. 1. Replace the server module with firmware version ≥ V1.1.1;
2. Firmware update of existing modules (requires specialized tools and processes)
(2) Parameter data recording
Parameter transmission: To modify parameters in RUN mode, the "WRREC" command is used to write the parameters into data record 128 (bytes 0-5, where byte 2 is the "L+power loss group diagnosis" enable bit, bit=1 enabled).
Error handling: When an error occurs during parameter transmission, the module ignores the error and maintains the original parameter configuration. At the same time, the error code is written into the "STATUS" output parameter. The meaning of the error code can be queried through STEP 7 online help.

Email:wang@kongjiangauto.com