Diagnosis and Display

In case of overload or short-circuit, the outputs switch off automatically and try to switch on again cyclically. Therefore an acknowledgement of the outputs is not necessary. The LED error message, however, is stored.

Diagnosis:

E1..E4 d1 d2 d3 d4

Identifier

000..063

 AC500 display <− Display in
Class Comp Dev Mod Ch Err PS501 PLC browser

Byte 6

Bit 6..7

 - Byte 3 Byte 4 Byte 5

Byte 6

Bit 0..5

 FBP diagnosis block
Class Interface Device Module Channel Error identifier Error message Remedy
 
     
Module error DC551-CS31
3 11 ADR 31 31 19 Checksum error in the I/O module Replace I/O module
3 11 ADR 31 31 3 Timeout in the I/O module
3 11 ADR 31 31 40 Different hard-/firmware versions in the module
3 11 ADR 31 31 43 Internal error in the module
3 11 ADR 31 31 36 Internal data exchange failure
3 11 ADR 31 31 9 Overflow diagnosis buffer New start
3 11 ADR 31 31 26 Parameter error Check master
3 11 ADR 31 31 11 Process voltage too low Check process voltage
3 11 ADR 1…7 31 17 No communication to the I/O module Replace I/O module
4 11 ADR 31 31 45 Process voltage ON/OFF Process voltage ON
4 11 ADR 31/1..7 31 34 No reply at initialization of the I/O module Replace I/O module
4 11 ADR 31/1.7 31 32 Wrong I/O module in the slot Replace I/O module or check configuration
Channel error DC551-CS31
4 11 ADR 31/1..7 8..23 47 Short-circuit at a digital output Check connection

Remarks:

In AC500 the following interface identifier applies:

11 = COM1 (protocol CS31 bus only possible with COM1)
With “Device” and CS31 bus master, the hardware address of the DC551-CS31 (0…69) is output.

With “Module” the following allocation applies:

31 = Module itself, 1…7 = Expansion 1…7
In case of module errors, with channel “31 = Module itself” is output.

Displays:

The LEDs are on the front panels of the modules. There are two different groups:

  • The 4 system LEDs (PWR, S-ERR, CS31 and I/O-Bus) show the operating status of the module and indicate possible errors.
  • The 28 process LEDs (UP, inputs, outputs, CH-ERR2 to CH-ERR4) display the supply voltage and signal statuses of the inputs and outputs and indicate possible errors.

All of the S500 modules have LEDs to display operating statuses and errors.

Status of the LEDs:

LED Status Color LED = OFF LED = ON LED flashes
PWR System voltage green Missing internal system voltage or field bus supply is missing Internal system voltage is OK –
CS31 CS31 communication green No communication at the CS31 bus module Communication at the CS31 bus OK Diagnosis mode
S-ERR Sum Error red No error or system voltage is missing Internal error (storing can be parameterized) –
I/O-Bus Communication via the I/O-Bus green No expansion modules connected or data error Expansion modules connected Error I/O-Bus
Reserved Not defined        
I0…I7 Digital inputs yellow Input = OFF Input = ON (the input voltage is even displayed if the supply voltage is OFF)  
C8…C23 Digital inputs/outputs yellow Input/output = OFF Input/output = ON (the input voltage is even displayed if the supply voltage is OFF)  
UP Process supply voltage and initialization green Process voltage is missing Process voltage OK –
CH-ERR2 Channel Error, error messages in groups (digital inputs/outputs combined into the groups 2 to 4) red No error Serious error within the corresponding group Error on one channel of the corresponding group (e.g. short-circuit at an output)
CH-ERR3 red
CH-ERR4 red
CH-ERR *) Module Error red No error or process voltage is missing Internal error –
*) All LEDs CH-ERR2 to CH-ERR4 light up together

The status of the LEDs concerning the CS31 Bus Module in connection with the I/O expansion modules is described in detail in the S500 system data.