ABB CS31 distributed debugging

8.3 Program cannot start

Phenomenon: After power on or hot start, the RUN LED does not light up and the FK3 LED lights up.

Possible reasons:

KW 00, 09 is set to n, but the actual number of slave stations connected to the bus is less than n. At this time, the master station will not start the user program.

There is a syntax error in the user program (FK4 error identifier 131). Use the FEHLER command in terminal mode to view the error register, or download the program again through programming software.

The cycle time KD 00.00 is set too short, and the CPU cannot complete all tasks in one cycle (FK3 error 200). Solution: Increase KD 00,00 appropriately (at least 5ms integer multiple), and check the CPU load rate through the AL command (should be below 80%).

8.4 Input signal not detected

Phenomenon: The switch on site has been activated, but the corresponding E address value in the central unit remains unchanged.

Reason:

The input common terminal (ZP1. x) is not properly connected to 24V or 0V. Check the wiring.

The input signal voltage has not reached the threshold (ON threshold of 24V signal ≥ 15V, OFF ≤ 5V).

The position of DIP switch 8 on the ECZ base is incorrect, resulting in channel number offset (for example, when switch 8=ON, the actual physical input corresponds to E xx, 08~15, not E xx, 00~07).

The input delay setting is too long (default 8ms, can be changed through configuration). In rapid response situations, it can be adjusted to a smaller size.

Maintenance and spare parts recommendations

Battery replacement: 07 KR 91/07 KT 92/07 KT 93 uses 07 LE 90 lithium battery module with a lifespan of approximately 5000 hours (25 ° C). When replacing, be sure to keep the central unit powered on, otherwise the data in RAM (including some flags and real-time clock) will be lost. After inserting the new battery, check that the "Battery" red LED should turn off.

Grounding inspection: Check every six months whether the functional grounding terminal (terminal 18) on the ECZ base is reliably connected to the ground of the control cabinet, and the cross-sectional area of the grounding wire is not less than 6mm ². Special attention: The Faston terminal (6.3mm) should be directly connected to the grounding of the switchgear.

Environmental requirements: The operating temperature of CS31 equipment is 0-55 ° C, humidity is ≤ 75% (annual average), and there is no condensation. If installed in an environment with conductive dust or corrosive gases, the equipment must be placed in a cabinet with a higher protection level.

Spare parts inventory recommendation: For critical production lines, it is recommended to stock one central unit of the same model, at least one commonly used I/O remote unit (such as ICSI 16 D1 or ICSO 08 R1), and several ECZ bases.