Description of Modicon M580-specific System Words %SW185 to %SW640

Word Symbol
%SW185 to %SW339 IOHEALTHij i=1...32, j=1...5	Function	Health bits of the S908 drops
Initial State	0
Words %SW185 to %SW339 are associated with drops 2 to 32. Each drop has 5 words assigned to the main and up to four configured extension racks: %SW185: module health bits of the S908 drop 2, rack 1 (main). %SW186: module health bits of the S908 drop 2, rack 2 (extension). %SW187 module health bits of the S908 drop 2, rack 3 (extension). %SW188 module health bits of the S908 drop 2, rack 4 (extension). %SW189 module health bits of the S908 drop 2, rack 5 (extension). ... %SW335: module health bits of the S908 drop 32, rack 1. %SW336: module health bits of the S908 drop 32, rack 2. %SW337 module health bits of the S908 drop 32, rack 3. %SW338 module health bits of the S908 drop 32, rack 4. %SW339 module health bits of the S908 drop 32, rack 5. NOTE: The Quantum drops support only two racks and system words for rack 3, 4, and 5 are not used. The 800 Series I/O drops support up to five racks. Bits 0 to 15 of each of these words are associated with the modules located in positions 16 to 1 of these racks. The bit equals 0 if the module is inoperative and equals 1 if the module is operating correctly. Example: %SW185.5 = 0: the module located in S908 drop 2, main rack, slot 11 is inoperative. NOTE: Modules 140 XBE 100 00 require a special management.
%SW535 RIOERRSTAT	Function	CRP error on start-up
Initial State	–
This word stores the start-up error code. This word is always set to 0 when the system is running; in the event of error, the CRP does not start up, but generates a stop status code. 01: I/O assignment length 02: Remote I/O link number 03: Number of stations in the I/O assignment 04: I/O assignment checksum 10: Length of the station descriptor 11: I/O station number 12: Station autonomy time 13: ASCII port number 14: Number of station modules 15: Station already configured 16: Port already configured 17: More than 1024 output points 18: More than 1024 input points 20: Module slot address 21: Module rack address 22: Number of output bytes 23: Number of input bytes 25: First reference number 26: Second reference number 28: Internal bits outside the 16 bit range 30: Unpaired odd output module 31: Unpaired odd input module 32: Unpaired odd module reference 33: Reference 1x after register 3x 34: Reference of dummy module already used 35: Module 3x is not a dummy module 36: Module 4x is not a dummy module
%SW536 CAERRCNT1 %SW537 CAERRCNT2 %SW538 CAERRCNT3	Function	Communication status on cable A
Initial State	–
The words %SW536 to %SW538 are the communication error words on cable A. %SW536: most significant byte: counts framing errors least significant byte: counts overruns of the DMA receiver. %SW537: most significant byte: counts receiver errors least significant byte: counts incorrect station receptions. %SW538: %SW538.0 = 1, short frame %SW538.1 = 1, CRC error %SW538.2 = 1, alignment error %SW538.4 = 1, abort %SW538.5 to %SW538.7 = residual char length %SW538.8 to %SW538.15 and %SW538.3 are unused
%SW539 CBERRCNT1 %SW540 CBERRCNT2 %SW541 CBERRCNT3	Function	Communication status on cable B
Initial State	–
The words %SW539 to %SW541 are the communication error words on cable B. %SW539: most significant byte: counts framing errors. least significant byte: counts overruns of the DMA receiver. %SW540: most significant byte: counts receiver errors. least significant byte: counts incorrect station receptions. %SW541: %SW541.0 = 1, short frame %SW541.1 = 1, CRC error %SW541.2 = 1, alignment error %SW541.4 = 1, abort %SW541.5 to %SW541.7 = residual char length %SW541.8 to %SW541.15 and %SW541.3 are unused
%SW542 GLOBERRCNT0 %SW543 GLOBERRCNT1 %SW544 GLOBERRCNT2	Function	Global communication status
Initial State	–
The words %SW542 to %SW544 are the global communication error words. %SW542: displays the global communication status: %SW542.15 = 1, communication operating correctly. %SW542.14 = 1, communication on cable A operating correctly. %SW542.13 = 1, communication on cable B operating correctly. %SW542.11 to %SW542.8 = lost communications counter. %SW542.7 to %SW542.0 = retry totalizer counter. NOTE: If the cable A is disconnected from the Standby PLC, standby status remains active. So the Primary PLC takes into account standby PLC, but instead of showing %SW542.14 = 0, the Primary %SW542.14 toggles between 0 and 1. %SW543: is the global error totalizer counter for cable A: most significant byte: frame detected error counter. least significant byte: no response counter. %SW544: is the global error totalizer counter for cable B: most significant byte: frame detected error counter. least significant byte: no response counter.
%SW548 to %SW640 MODUNHEALTHi IOERRCNTi IORETRYi i=2...32	Function	S908 Drops communication status
Initial State	–
The words %SW548 to %SW640 are used to describe the communication status of the S908 drops. 3 status words are used for each drops: %SW548: displays the global communication status for drop 2: %SW548.15 = 1, communication operating correctly. %SW548.14 = 1, communication on cable A operating correctly. %SW548.13 = 1, communication on cable B operating correctly. %SW548.11 to %SW548.8 = lost communications counter. %SW548.7 to %SW548.0 = retry totalizer counter. %SW549: is the global error totalizer counter for cable A drop 2: most significant byte: frame detected error counter. least significant byte: no response counter. %SW550: is the global error totalizer counter for cable B drop 2: most significant byte: frame detected error counter. least significant byte: no response counter. The words: %SW551 to %SW553 are assigned to S908 drop 3. %SW554 to %SW556 are assigned to S908 drop 4. ... %SW638 to %SW640 are assigned to S908 drop 32.

Word

Symbol

%SW185 to %SW339

IOHEALTHij

i=1...32, j=1...5

Function

Health bits of the S908 drops

Initial State

0

Words %SW185 to %SW339 are associated with drops 2 to 32. Each drop has 5 words assigned to the main and up to four configured extension racks:

%SW185: module health bits of the S908 drop 2, rack 1 (main).
%SW186: module health bits of the S908 drop 2, rack 2 (extension).
%SW187 module health bits of the S908 drop 2, rack 3 (extension).
%SW188 module health bits of the S908 drop 2, rack 4 (extension).
%SW189 module health bits of the S908 drop 2, rack 5 (extension).
...
%SW335: module health bits of the S908 drop 32, rack 1.
%SW336: module health bits of the S908 drop 32, rack 2.
%SW337 module health bits of the S908 drop 32, rack 3.
%SW338 module health bits of the S908 drop 32, rack 4.
%SW339 module health bits of the S908 drop 32, rack 5.

NOTE: The Quantum drops support only two racks and system words for rack 3, 4, and 5 are not used. The 800 Series I/O drops support up to five racks.

Bits 0 to 15 of each of these words are associated with the modules located in positions 16 to 1 of these racks.

The bit equals 0 if the module is inoperative and equals 1 if the module is operating correctly.

Example: %SW185.5 = 0: the module located in S908 drop 2, main rack, slot 11 is inoperative.

NOTE: Modules 140 XBE 100 00 require a special management.

%SW535

RIOERRSTAT

Function

CRP error on start-up

Initial State

–

This word stores the start-up error code. This word is always set to 0 when the system is running; in the event of error, the CRP does not start up, but generates a stop status code.

01: I/O assignment length

02: Remote I/O link number

03: Number of stations in the I/O assignment

04: I/O assignment checksum

10: Length of the station descriptor

11: I/O station number

12: Station autonomy time

13: ASCII port number

14: Number of station modules

15: Station already configured

16: Port already configured

17: More than 1024 output points

18: More than 1024 input points

20: Module slot address

21: Module rack address

22: Number of output bytes

23: Number of input bytes

25: First reference number

26: Second reference number

28: Internal bits outside the 16 bit range

30: Unpaired odd output module

31: Unpaired odd input module

32: Unpaired odd module reference

33: Reference 1x after register 3x

34: Reference of dummy module already used

35: Module 3x is not a dummy module

36: Module 4x is not a dummy module

%SW536

CAERRCNT1

%SW537

CAERRCNT2

%SW538

CAERRCNT3

Function

Communication status on cable A

Initial State

–

The words %SW536 to %SW538 are the communication error words on cable A.

%SW536:
- most significant byte: counts framing errors
- least significant byte: counts overruns of the DMA receiver.
%SW537:
- most significant byte: counts receiver errors
- least significant byte: counts incorrect station receptions.
%SW538:
- %SW538.0 = 1, short frame
- %SW538.1 = 1, CRC error
- %SW538.2 = 1, alignment error
- %SW538.4 = 1, abort
- %SW538.5 to %SW538.7 = residual char length
- %SW538.8 to %SW538.15 and %SW538.3 are unused

%SW539

CBERRCNT1

%SW540

CBERRCNT2

%SW541

CBERRCNT3

Function

Communication status on cable B

Initial State

–

The words %SW539 to %SW541 are the communication error words on cable B.

%SW539:
- most significant byte: counts framing errors.
- least significant byte: counts overruns of the DMA receiver.
%SW540:
- most significant byte: counts receiver errors.
- least significant byte: counts incorrect station receptions.
%SW541:
- %SW541.0 = 1, short frame
- %SW541.1 = 1, CRC error
- %SW541.2 = 1, alignment error
- %SW541.4 = 1, abort
- %SW541.5 to %SW541.7 = residual char length
- %SW541.8 to %SW541.15 and %SW541.3 are unused

%SW542

GLOBERRCNT0

%SW543

GLOBERRCNT1

%SW544

GLOBERRCNT2

Function

Global communication status

Initial State

–

The words %SW542 to %SW544 are the global communication error words.

%SW542: displays the global communication status:
- %SW542.15 = 1, communication operating correctly.
- %SW542.14 = 1, communication on cable A operating correctly.
- %SW542.13 = 1, communication on cable B operating correctly.
- %SW542.11 to %SW542.8 = lost communications counter.
- %SW542.7 to %SW542.0 = retry totalizer counter.
NOTE: If the cable A is disconnected from the Standby PLC, standby status remains active. So the Primary PLC takes into account standby PLC, but instead of showing %SW542.14 = 0, the Primary %SW542.14 toggles between 0 and 1.
%SW543: is the global error totalizer counter for cable A:
- most significant byte: frame detected error counter.
- least significant byte: no response counter.
%SW544: is the global error totalizer counter for cable B:
- most significant byte: frame detected error counter.
- least significant byte: no response counter.

%SW548 to %SW640

MODUNHEALTHi IOERRCNTi IORETRYi

i=2...32

Function

S908 Drops communication status

Initial State

–

The words %SW548 to %SW640 are used to describe the communication status of the S908 drops. 3 status words are used for each drops:

%SW548: displays the global communication status for drop 2:
- %SW548.15 = 1, communication operating correctly.
- %SW548.14 = 1, communication on cable A operating correctly.
- %SW548.13 = 1, communication on cable B operating correctly.
- %SW548.11 to %SW548.8 = lost communications counter.
- %SW548.7 to %SW548.0 = retry totalizer counter.
%SW549: is the global error totalizer counter for cable A drop 2:
- most significant byte: frame detected error counter.
- least significant byte: no response counter.
%SW550: is the global error totalizer counter for cable B drop 2:
- most significant byte: frame detected error counter.
- least significant byte: no response counter.

The words:

%SW551 to %SW553 are assigned to S908 drop 3.
%SW554 to %SW556 are assigned to S908 drop 4.
...
%SW638 to %SW640 are assigned to S908 drop 32.