Rockwell Automation 1785 PLC-5, 1785 Quick Reference

1785 PLC-5 Programmable Controllers Quick Reference

Addressing Instruction SetHardware Components Switch Settings Troubleshooting

Front Panels ........................ 1-1

Processor Comparison......... 1-6

1771 I/O Chassis ...............1-10

Power Supplies.................. 1-11

Keyswitch..........................1-13

Processor Status File ......... 1-14

I/O Status File .................... 1-30

Data Table Files ...................2-1

Program Files ......................2-4

I/O Image Addressing...........2-5

Logical Addressing...............2-6

Indexed Addressing..............2-7

Indirect Addressing ..............2-7

I/O Addressing Modes ..........2-8

I/O Placement ......................2-8

Concept Summary................2-9

Status Bits........................... 3-1

Relay................................... 3-2

Timer .................................. 3-5

Counter ............................... 3-7

Compare ............................. 3-9

Compute ........................... 3-12

Logical .............................. 3-22

Conversion ........................ 3-24

Bit Modify and Move.......... 3-26

File.................................... 3-28

Diagnostic ......................... 3-30

Shift Register..................... 3-32

Sequencer......................... 3-35

Program Control ................ 3-36

Processor Control and

Message ........................... 3-41

Block and ControlNet

Transfer ............................ 3-43

ASCII ................................. 3-47

Chassis Backplane............... 4-1

Chassis Configuration ..........4-3

Complementary I/O .............. 4-4

Enhanced and

Ethernet PLC-5 ....................4-7

ControlNetwork Address ....4-11

Classic PLC-5 ....................4-12

Ethernet Jumper ................ 4-21

Enhanced and Ethernet PLC-5

General .........................5-1

Communication.............5-3

PLC-5/40L and PLC-5/60L

Communication ....................5-5

Ethernet

Status and Transmit .............5-7

ControlNet

Status Indicators ..................5-8

Classic PLC-5

General ..............................5-12

Adapter Mode .............5-14

Scanner Mode.............5-15

Remote I/O .........................5-17

Extended Local I/O .............5-25

Flex I/O ControlNet .............5-28

1771 I/O ControlNet............5-29

ControlNet I/O Status..........5-30

ControlNet Errors................5-35

Fault Codes ........................5-45

Using this Manual

This Quick Reference provides information frequently needed for using and maintaining your Allen-Bradley PLC-5 processor. It is intended for reference purposes only, and not as the sole source of information.

For more specific information on any topic in this Quick Reference, see:

• Enhanced and Ethernet PLC-5 Family Programmable Controllers User Manual, publication 1785-6.5.12

• Classic PLC-5 User Manual, publication 1785-6.2.1

• ControlNet PLC-5 Programmable Controllers Phase 1.5 User Manual, publication 1785-6.5.22

Important User Information

Because of the variety of uses for the products described in this publication, those responsible for the application and use of this control equipment must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards.

The illustrations, charts, sample programs and layout examples shown in this guide are intended solely for purposes of example. Since there are many variables and requirements associated with any particular installation, Allen-Bradley does not assume responsibility or liability (to include intellectual property liability) for actual use based upon the examples shown in this publication.

The Safety Guidelines for the Application, Installation, and Maintenance of Solid State Control, publication SGI-1.1 (available from your local Allen-Bradley office), describes some important differences between solid-state equipment and electromechanical devices which should be taken into consideration when applying products such as those described in this publication.

Reproduction of the contents of this copyrighted publication, in whole or in part, without written permission of Allen-Bradley Company, Inc. is prohibited.

Summary of Changes

In this release of the PLC-5 Quick Reference, we have altered the way we reference software documentation. Rather than show specific screens and key sequences which may vary according to the software package you are using, we refer you instead to the programming software documentation that accompanies your particular software package. Of course, we still provide the essential reference information you need to quickly accomplish your tasks, but if you have specific questions about software procedures, you should refer to your programming software documentation set.

To help you find new information, we included change bars as shown to the left of this paragraph.

Conventions

The table below describes the naming conventions used in this manual:

☞ You see this symbol in the lower right-hand corner of the page when information is continued on the next page.

© 1999 Rockwell Automation PLC, PLC-2, PLC-3, PLC-5, PLC-5/10, PLC-5/11, PLC-5/12, PLC-5/15, PLC-5/20, PLC-5/25, PLC-5/30, PLC-5/40, PLC-5/40L, PLC-5/60, PLC-5/60L, PLC-5/80, PLC-5/20E, PLC-5/40E, PLC-5/80E, PLC-5/250, PLC-5/20C, PLC-5/40C, PLC-5/80C, Ethernet, and DH+ are trademarks of Rockwell Automation.

This name: Represents these processors:

Enhanced

PLC-5/11™PLC-5/40

™

PLC-5/20™PLC-5/60

™

PLC-5/30™PLC5/80

™

PLC-5/40L™PLC-5/60L

™

Ethernet

PLC-5/20E™PLC-5/40E

™

PLC5/80E

™

ControlNet Phase 1.5

PLC-5/20C15™ 5/40C15

™

5/80C15

™

Classic

PLC-5/10™PLC-5/15

™

PLC-5/12™PLC-5/25

™

Hardware Components

Front Panel 1-1

Front Panel – Enhanced PLC-5 Processors

Channel 1A fixed DH+ port

Keyswitch

Channel 0 - on-board

serial port

Channel 1A status indicator (green/red)

Connect programming terminal here when channel 1A is configured for DH+ communications

Channel 1A communication port

Install memory module here

Battery holder

Channel 1B status indicator (green/red)

Channel 1B communication port

PLC-5/11 Processor PLC-5/20 Processor

Battery (red) Processor RUN/FAULT (green/red) Force (amber) Channel 0 communication

status (green)

Indicators:

Hardware Components

Front Panel 1-2

PLC-5/30, -5/40, -5/60,

-5/80 Processor

PLC-5/40L, -5/60L Processor

Keyswitch

Battery holder

Channel 2A status indicator (green/red)

Connect programming terminal here when channel 2A is configured for DH+ communications

Channel 2A communication port

Channel 2B communication port

Channel 1A status indicator (green/red)

Channel 1A communication port

Channel 1B communication port

Channel 2 status indicator (green/red)

Channel 2 extended-local I/O communication port

Channel 2B status indicator (green/red)

Install memory module here

Channel 1B status indicator (green/red)

Channel 0 - on-board serial port

The PLC-5/30 processor has 2 communication ports and 1 serial port

Battery (red) Processor RUN/FAULT (green/red) Force (amber) Communication ACTIVE/FAULT

status (green/red)

Indicators:

Labels to write information about the channel communication mode, station addresses, etc.

Connect programming terminal here when channel 1A is configured for DH+ communications

Hardware Components

Front Panel 1-3

Front Panel – Ethernet PLC-5 Processors

PLC-5/20E Processor

Keyswitch

Channel 0 - on-board serial port

Channel 1A status indicator (green/red)

Connect programming terminal here

Channel 1A

Battery (red) Processor RUN/FAULT (green/red) Force (amber) Channel 0 communication

status (green)

Install memory module here

Battery holder

Channel 1B status indicator (green/red)

Channel 1B

Channel 2 Ethernet status indicators

Channel 2

Indicators:

Battery (red) Force (amber)

Communication ACTIVE/FAULT (green/red)

Channel 0 - on-board serial port

Labels to write information about the channel communication mode, station addresses, etc.

Keyswitch

Channel 1A

Channel 1B

Battery holder

Channel 2

Indicators:

PLC-5/40E, -5/80E Processor

Channel 1A status indicator (green/red)

Connect programming terminal here

Channel 2 Ethernet status indicators

Processor RUN/FAULT (green/red)

Install memory module here

Channel 1B status indicator (green/red)

Hardware Components

Front Panel 1-4

Channel 2 Status Indicators

PLC-5/20C15 Processor

Keyswitch

I/O Status Indicator

Network Access Port

Channel 2

Channel 0

Channel 1 Status Indicators

DH+ Programming Terminal Connection to Channel 1A

Channel 1A

Battery

Processor RUN/FAULT Force

Channel 0 Communication ACTIVE/FAULT

Memory Module Space

Battery Holder

Channel 1B

Keyswitch

I/O Status Indicator

Channel 2 Status Indicators

Network Access Port

Channel 2

Channel 1 Status Indicators

DH+ Programming Terminal Connection to Channel 1A

Channel 1A

Channel 1B

Battery

Processor RUN/FAULT Force

Channel 0 Communication ACTIVE/FAULT

Channel 0 - on-board serial port

Memory Module Space

Battery Holder

PLC-5/40C15, -5/80C15 Processor

Front Panel – ControlNet PLC-5 Processors

ControlNet PLC-5 Processors

Phase Catalog Number

1.0/1.25 1785L20C, -L40C, -L80C

1.5 1785L20C15, -L40C15, -L80C15

Hardware Components

Front Panel 1-5

Hardware Components

REM I/O indicator ACTIVE/FAULT (green/red)

P R O G

PLC-5/10 Processor PLC-5/12, -5/15, -5/25 Processor

Keyswitch

DH+ communication indicator ACTIVE/FAULT (green/red)

Connect programming terminal here

Connect DH+ link here

Adapter indicator (green)

Connect remote I/O link here

Battery holder

Write the DH+ network station number on this label

12373

Battery (red) Processor RUN/FAULT (green/red) Force (amber)

Indicators:

Front Panel – Classic PLC-5 Processors

Hardware Components

Processor Comparison 1-6

Comparison Chart for

PLC-5 Family Processors

Processor Memory

(Words)

Local Chassis

Remote Chassis (I/O Racks)

I/O Capacity Communication

PLC-5/10 6K 1 resident none

128 (8-pt) 1, 256 (16-pt) 1, 512 (32-pt)

DH+ link

PLC-5/12 6K 1 resident none

128 (8-pt) 1, 256 (16-pt) 1, 512 (32-pt)

adapter, DH+ link

PLC-5/15 6K

(expands to 14K)

1 resident 12

(3 I/O racks)

• 512

• 512 inputs and 512 outputs using 16- or 32-pt modules

adapter/remote I/O scanner, DH+ link

PLC-5/25 13K

(expands to 21K)

1 resident 28

(7 I/O racks)

• 1024

• 1024 inputs and 1024 outputs using 16or 32-pt modules

adapter/remote I/O scanner, DH+ link

PLC-5/11 8K 1 resident 4

(1 I/O rack) rack must be addressed as rack 3

• 256 (8-pt), 384 (16-pt), or 512 (16-pt)

• 512(16-pt) or 768 (32-pt)

• 1 channel (remote I/O scanner, adapter, DH+ link)

• 1 RS-232, RS-422, RS-423 serial port

1 Any mix of I/O 2 Maximum I/O possible using 16-pt modules with 2-slot addressing or 32-pt modules with 1-slot addressing. Modules must alternate input/output in the chassis slots.

Hardware Components

Processor Comparison 1-7

PLC-5 comparison chart continued...

Processor Memory

(Words)

Local Chassis

Remote Chassis (I/O Racks)

I/O Capacity Communication

PLC-5/20 16K 1 resident 12

(3 I/O racks)

• 512

• 512 inputs and 512 outputs using 16- or 32-pt modules

• 1 channel (remote I/O scanner, adapter, DH+ link)

• 1 channel DH+ link

• 1 RS-232, RS-422, RS-423 serial port

PLC-5/20E 16K 1 resident 12

(3 I/O racks)

• 512

• 512 inputs and 512 outputs using 16- or 32-pt modules

• 1 channel (remote I/O scanner, adapter, DH+ link)

• 1 channel DH+ link

• 1 RS-232, RS-422, RS-423 serial port

• 1 channel Ethernet

PLC-5/20C15 16K 1 resident 12 (3 I/O racks)

• 512

• 512 inputs and 512 outputs using 16- or 32-pt modules

• 1 channel (remote I/O scanner, adapter, DH+ link)

• 1 channel DH+ link

• 1 RS-232, RS-422, RS-423 serial port

• ControlNet

PLC-5/30 32K 1 resident 28

(7 I/O racks)

• 1024

• 1024 inputs and 1024 outputs using16or 32-pt modules

• 2 channels (remote I/O scanner, adapter, DH+ link)

• 1 RS-232, RS-422, RS-423 serial port

Any mix of I/O

Hardware Components

Processor Comparison 1-8

PLC-5 comparison chart continued...

Processor Memory

(Words)

Local Chassis

Remote Chassis (I/O Racks)

I/O Capacity Communication

PLC-5/40

48K

1 resident

(15 I/O racks)

• 2048

• 2048 inputs and 2048 outputs using 16or 32-pt modules

• 4 channels (remote I/O scanner, adapter, DH+ link)

• 1 RS-232, RS-422, RS-423 serial port

PLC-5/40L

48K

1 resident up to 16 extended

(15 I/O racks)

• 2048

• 2048 inputs and 2048 outputs using 16or 32-pt modules

• 2 channels (remote I/O scanner, adapter, DH+ link)

• 1 RS-232, RS-422, RS-423 serial port

• 1 channel extended local I/O scanner

PLC-5/40E

48K

1 resident (16 rack addressing capability)

60 (15 I/O racks)

• 2048

• 2048 inputs and 2048 outputs using 16or 32-pt modules

• 2 channels (remote I/O scanner, adapter, DH+ link)

• 1 RS-232, RS-422, RS-423 serial port

• 1 channel Ethernet

PLC-5/40C15

48K

1 resident 60

15 I/O racks

• 2048

• 2048 inputs and 2048 outputs using 16or 32-pt modules

• 2 channels (remote I/O scanner, adapter, DH+ link)

• 1 RS-232, RS-422, RS-423 serial port

• 1 channel ControlNet

PLC-5/60

64K 1 resident

(23 I/O racks)

• 3072

• 3072 inputs and 3072 outputs using 16or 32-pt modules

• 4 channels (remote I/O scanner, adapter, DH+ link)

• 1 RS-232, RS-422, RS-423 serial port

Any mix of I/O

Maximum of 32 physical devices/channel

Maximum of 57K words per program file and 32K words per data table file

Hardware Components

Processor Comparison 1-9

PLC-5 comparison chart continued...

PLC-5 ControlNet Processors - Maximum I/O Map Entries

Processor Memory

(Words)

Local Chassis

Remote Chassis (I/O Racks)

I/O Capacity Communication

PLC-5/60L

64K 1 resident up

to 16 extended

(23 I/O racks)

• 3072

• 3072 inputs and 3072 outputs using16or 32-pt modules

• 2 channels (remote I/O scanner, adapter, DH+ link)

• 1 RS-232, RS-422, RS-423 serial port

• 1 channel extended local I/O scanner

PLC-5/80

3.4

100K 1 resident

(23 I/O racks)

• 3072

• 3072 inputs and 3072 outputs using 16or 32-pt modules

• 4 channels (remote I/O scanner, adapter, DH+ link)

• 1 RS-232, RS-422, RS-423 serial port

PLC-5/80E

3,4

100K 1 resident

(23 I/O racks)

• 3072

• 3072 inputs and 3072 outputs using 16or 32-pt modules

• 2 channels (remote I/O scanner, adapter, DH+ link)

• 1 RS-232, RS-422, RS-423 serial port

• 1 channel Ethernet

PLC-5/80C15

3.4

100K 1 resident

(23 I/O racks)

• 3072

• 3072 inputs and 3072 outputs using 16or 32-pt modules

• 2 channels (remote I/O scanner, adapter, DH+ link)

• 1 RS-232, RS-422, RS-423 serial port

• 1 channel ControlNet

Any mix of I/O

Maximum of 32 physical devices/channel

Maximum of 57K words per program file and 32K words per data table file

Maximum of 64K words total data table space

Phase 1.0/1.25 Phase 1.5

Processor Number of

Mappings:

Number of DIF Files:

Number of DIF Words:

Number of DOF Files:

Number of DOF Words:

Processor Number of

Mappings:

Number of DIF Files:

Number of DIF Words:

Number of DOF Files:

Number of DOF Words:

PLC-5/20C 64 1 1000 1 1000 PLC-5/20C 64 2 2000 2 2000 PLC-5/40C 64 1 1000 1 1000 PLC-5/40C 96 3 3000 3 3000 PLC-5/80C 64 1 1000 1 1000 PLC-5/80C 128 4 4000 4 4000

Hardware Components

1771 I/O Chassis 1-10

1771 I/O Chassis for PLC-5 Family

Processors

7KH3/&SURFHVVRUVDUHDOVRFRPSDWLEOHZLWK$$DQG$FKDVVLVZLWKVORWSRZHUVXSSOLHVRQO\

Catalog Number Chassis Size Mounting

Backpanel 19” Rack

Power Supply Socket

1771-A1B 4-slot X left 1771-A2B 8-slot X left 1771-A3B 12-slot X X top

1771-A3B1 12-slot X left

1771-A4B 16-slot X left

When using these processors with the 1771-A1, A2, and A4 chassis:

Only this mode of addressing is supported:

Classic PLC-5 processors 2-slot and 1-slot in the local rack

Enhanced and Ethernet PLC-5 processors 2-slot addressing

ControlNet PLC-5 processors 2-slot addressing

Hardware Components

Power Supply Modules 1-11

Power Supply Modules in a Chassis

(containing a PLC-5 processor)

Output Current

Output Current (in amps) when Parallel with: Power Supply

Power Supply Input Power (in Amps) P3 P4 P4S P4S1 P5 P6S P6S1 Location

1771-P3 120V ac 3 6 11 11 slot

1771-P4 120V ac 8 11 16 16 slot

1771-P4S 120V ac 8 11 16 16 slot

1771-P4S1 100V ac 8 16 slot

1771-P4R 120V ac

8, 16, 24

slot

1771-P5 24V dc 8 16 slot

1771-P6S 220V ac 8 16 slot

1771-P6S1 200V ac 8 16 slot

1771-P6R 220V ac

8, 16, 24

slot

1771-P7 120/220V ac 16

external

1771-PS7 120/220V ac 16

external

You cannot use an external power supply and a power supply module to power the same chassis; they are not compatible.

See publication 1771-2.166 for more information.

Hardware Components

Power Supplies 1-12

Power Supplies in a Remote Chassis (1771-ASB)

or an Extended Local I/O Chassis (1771-ALX)

Output Current Output Current (in amps) when Parallel with: Power Supply

Power Supply Input Power (in Amps) P3 P4 P4S P4S1 P5 P6S P6S1 Location

1771-P3 120V ac 3 6 11 11 slot

1771-P4 120V ac 8 11 16 16 slot

1771-P4S 120V ac 8 11 16 16 slot

1771-P4S1 100V ac 8 16 slot

1771-P4R 120V ac 8, 16, 24

slot

1771-P5 24V dc 8 16 slot

1771-P6S 220V ac 8 16 slot

1771-P6S1 200V ac 8 16 slot

1771-P6R 220V ac 8, 16, 24

slot

1771-P1 120/220V ac 6.5 external

1771-P2 120/220V ac 6.5 external

1771-P7 120/220V ac 16 external

1771-PS7 120/220V ac 16 external

1777-P2 120/220V ac 9 external

1777-P4 24V dc 9 external

You cannot use an external power supply and a power supply module to power the same chassis; they are not compatible.

See publication 1771-2.166 for more information.

Hardware Components

Keyswitch 1-13

Front Panel Keyswitch

Keyswitch Position

Operation RUN PROG REM

RUN PROG

Execute programs (with outputs enabled) X X Execute programs (with outputs disabled) Save program to disk X X X X Restore programs X X X Create or delete: ladder files, SFC files, data table files X X Edit online: ladder files and SFC files

(program files already exist)

X X X

Force live outputs X X Prohibit processor from scanning program X X Change operating mode using a programming device X X Download to/from EEPROM X X Automatically configure remote I/O X X Edit data table values

(data table files already exist)

X X X X

Establish ControlNet connections and exchange data X X X X

Hardware Components

Processor Status File 1-14

Processor Status File

This word of the status file: Stores:

S:0 Arithmetic flags

• bit 0 = carry

• bit 1 = overflow

• bit 2 = zero

• bit 3 = sign

S:1 Processor status and flags

Bit

Description 0 RAM checksum is invalid at power-up 1 processor in RUN mode 2 processor in TEST mode 3 processor in PROG mode 4 processor burning EEPROM 5 processor in download mode 6 processor has test edits enabled 7 mode select switch in REMOTE position 8 forces enabled 9 forces present 10 processor successfully burned EEPROM 11 performing online programming 12 not defined 13 user program checksum calculated 14 last scan of ladder or SFC step 15 processor running first program scan or the first scan of the next step

in an SFC

Hardware Components

Processor Status File 1-15

processor status file continued

This word of the status file: Stores:

S:7 Global status bits:

• S:7/0-7 - - rack fault bits for racks 0-7

• S:7/8-15 - - rack queue-full bits for racks 0-7 See also S:27, S:32, S:33, S:34, and S:35

S:8 Last program scan (in ms) S:9 Maximum program scan (in ms) S:2 Switch setting information

• bits 0 - 6 DH+ station number

• bit 11-12 are set based on the I/O chassis backplane switches

• bit 12

bit 11 = I/O chassis addressing

0 0 illegal 1 01/2-slot 0 11-slot 1 12-slot

• bit 13: 1 = load from EEPROM

• bit 14: 1 = RAM backup not configured

• bit 15: 1 = memory unprotected

S:3 to S:6 Active Node table for channel 1A

Word Bits DH+ Station # 3 0-15 00-17 4 0-15 20-37 5 0-15 40-57 6 0-15 60-77

Hardware Components

Processor Status File 1-16

processor status file continued...

This word of the status file: Stores:

S:10 Minor fault (word 1)

Bit Description 0 battery is low (replace in 1-2 days) 1 DH+ active node table has changed 2 STI delay too short, interrupt program overlap 3 EEPROM memory transfer at power-up 4 edits prevent SFC continuing; data table size changed

during program mode; reset automatically in run mode 5 invalid I/O status file 6 not defined 7 no more command blocks exist 8 not enough memory on the memory module to upload the program from the processor 9 no MCP is configured to run 10 MCP not allowed 11 PII word number not in local rack 12 PII overlap 13 no command blocks exist to get PII 14 arithmetic overflow 15 SFC action overlap

See also S:17

Hardware Components

Processor Status File 1-17

processor status file continued...

This word of the status file: Stores:

S:11 Major fault

Bit Description 0 corrupted program file (codes 10-19) 1 corrupted address in ladder file (codes 20-29) 2 programming error (codes 30-49) 3 SFC fault (codes 71-79) 4 error while assembling program (code 70); duplicate LBLs found 5 start-up protection fault; processor sets this bit when powering up in run mode if bit S:26/1 is set 6 peripheral device fault 7 jumped to fault routine (codes 0-9) 8 watchdog faulted 9 system configured wrong (codes 80-89) 10 recoverable hardware error 11 MCP does not exist or is not ladder or SFC file 12 PII does not exist or is not ladder 13 STI does not exist or is not ladder 14 fault routine does not exist or is not ladder 15 fault occurred in a non-ladder file

Hardware Components

Processor Status File 1-18

processor status file continued...

This word of the status file: Stores:

S:12 Fault codes

Code Description 0-9 user-defined 10 failed data table check 11 bad user program checksum 12 bad integer operand type 13 bad mixed mode operand type 14 not enough operands for instruction 15 too many operands for instruction 16 bad instruction found 17 no expression end in a CPT math expression 18 missing end of edit zone 19 download aborted 20 indirect address out of range (high) 21 indirect address out of range (low) 22 attempt to access undefined file 23 file number less than 0 or greater than number of defined files; or,

indirect reference to file 0, 1, 2; or bad file number24

indirect reference to wrong file type 25 reserved 26 reserved 27 reserved 28 reserved 29 reserved 30 subroutine jump nesting level exceeded

Hardware Components

Processor Status File 1-19

processor status file continued...

This word of the status file: Stores:

S:12 continued... Fault codes

Code Description 31 too few subroutine parameters 32 jump to non-ladder file 33 CAR routine not 68000 code 34 bad timer parameters entered 35 bad PID delta time entered 36 PID setpoint out of range 37 invalid I/O specified in an immediate I/O instruction 38 invalid use of return instruction 39 FOR loop missing NXT 40 control file too small 41 NXT instruction with no FOR 42 jump target does not exist or JMP missing LBL 43 file is not an SFC 44 error using SFR 45 invalid channel number entered 46 IDI or IDO instruction length operand too long (> 64 words) 46-69 reserved

Hardware Components

Processor Status File 1-20

processor status file continued...

This word of the status file: Stores:

S:12 continued... Fault codes

Code Description 70 duplicate labels 71 SFC subchart is already executing 72 tried to stop an SFC that is not running 73 maximum number of SFC subcharts exceeded 74 SFC file error 75 SFC contains too many active steps 76 SFC step loops back to itself 77 SFC references a step, transition, subchart, or SC file that is

missing, empty or too small 78 SFC could not continue after power loss 79 error in downloading an SFC to a processor that cannot run

SFCs or this specific PLC processor does not support this

Enhanced SFC 80 I/O configuration error 81 illegal setting of I/O chassis backplane switch 82 illegal cartridge type 83 user watchdog fault 84 error in user-configured adapter mode block transfers 85 bad cartridge 86 cartridge incompatible with host 87 rack addressing overlap (includes any adapter channel)

Hardware Components

Processor Status File 1-21

processor status file continued...

This word of the status file: Stores:

S:12 continued... Fault codes

Code Description 88 scanner channels are overloading the remote I/O buffer; too much data for the

processor to process 90 Sidecar module extensive memory test failed 91 Sidecar module undefined message type 92 Sidecar module requesting undefined pool 93 Sidecar module illegal maximum pool size 94 Sidecar module illegal ASCII message 95 Sidecar module reported fault, which may be the result of a bad

program that corrupts memory or of a hardware failure 96 Sidecar module not physically connected to the PLC-5 processor 97 Sidecar module requested a pool size that is too small for PCCC command (occurs at power-up) 98 Sidecar module first/last 16 bytes RAM test failed 99 Sidecar module-to-processor data transfer faulted 100 Processor-to-sidecar module data transfer failed 101 Sidecar module end of scan data transfer failed 102 The file number specified for raw data transfer through the sidecar

module is an illegal value 103 The element number specified for raw data transfer through the

sidecar module is an illegal value 104 The size of the raw data transfer requested through the sidecar module is an illegal size 105 The offset into the raw data transfer segment of the sidecar module is an illegal value

Hardware Components

Processor Status File 1-22

processor status file continued...

This word of the status file: Stores:

S:12 continued... Fault codes

Code Description 106 Sidecar module transfer protection violation; for PLC-5/26, -5/46,

and -5/86 processors only 200 ControlNet scheduled output data missed 201 ControlNet input data missed 202 Not used 203 Reserved 204 ControlNet configuration is too complex 205 ControlNet configuration exceeds bandwidth

206 Reserved 207 Reserved 208 Too many pending ControlNet I/O connections

S:13 Program file where fault occurred S:14 Rung number where fault occurred S:15 VME status file S:16 I/O Status File

Hardware Components

Processor Status File 1-23

processor status file continued...

This word of the status file: Stores:

S:17 Minor fault (word 2)

Bit Description 0 BT queue full to remote I/O 1 queue full – channel 1A; maximum remote block transfers used 2 queue full – channel 1B; maximum remote block transfers used 3 queue full – channel 2A; maximum remote block transfers used 4 queue full – channel 2B; maximum remote block transfers used 5 no modem on serial port 6 remote I/O rack in local rack table; or, remote I/O rack is greater than the image size 7 firmware revision for channel pairs 1A/1B or 2A/2B does not

match processor firmware revision 8 ASCII instruction error 9 duplicate node address 10 DF1 master poll list error 11 protected processor data table element violation 12 protected processor file violation 13 using all 32 ControlNet MSGs 14 using all 32 ControlNet 1771 READ and/or 1771 WRITE CIOs 15 using all 8 ControlNet Flex I/O CIOs

Rockwell Automation 1785 PLC-5, 1785 Quick Reference

Specifications and Main Features

Frequently Asked Questions

User Manual