Rockwell Automation 1785-L11B, 1785-L20B, 1785-L30B, 1785-L40B, 1785-L40L User Manual

Installation Instructions

Enhanced PLC5
Programmable Controller
Firmware Upgrade

(Catalog Numbers 1785-L11B, -L20B, -L30B,

-L40B, -L40L, -L60B, -L60L, -L80B)

Using These Instructions

AB

Before You Install ...

These instructions describe:

• an important safety precaution involving static electricity

discharges

• how to upgrade the processor firmware

For more information about PLC-5 processors, see the Enhanced and
Ethernet PLC-5 User Manual, publication number 1786-6.5.12. For
more information, contact your Allen-Bradley service representative.

Printed circuit board components and Programmable Read-only
Memory (PROM) devices can be damaged during routine handling
and installation. Follow these precautions to reduce static electricity
discharges before you upgrade the processor firmware.

• Handle the printed circuit boards and PROMs by the case or

carrier without touching the pins or the edge connector.

• Use a static-free workstation.

• Connect the static-free workstation to ground through a minimum

200K ohm resistance.

• Wear a grounded, conductive wrist strap with a minimum 200K

ohm resistance.

• Ground all tools before you begin to upgrade the firmware.

• Control the relative humidity of the installation area – ideal

conditions are 40% to 60% relative humidity.

Publication17855.13 April 1996

Enhanced PLC-5 Programmable Controller Firmware Upgrade2

To Upgrade the Processor Firmware ...

keyswitch;
selects processor mode

Follow these steps to upgrade the processor firmware.

1

Save

processor memory using the programming software.

2

Remove the battery cover and disconnect the battery

Skip this step if you have a PLC5/1

Remove the phillips head screw near the channel 1B LED and

3

gently remove the channel 1 communication plug. Be aware
that the memory grounding clip may move or drop off from the
cover mounting tab.

Skip this step if you have a PLC5/1

Remove the lug nuts that hold the serial channel to the metal

4

face plate. These lug nuts are located on the exposed circuit
board for PLC5/40 and 5/60 processors.

1 or 5/20 processor

1 or 5/20 processor

.

.

.

channel 0 serial port

channel 1A status indicator

8pin miniDIN, DH+ programming
terminal connection

channel 1A communication
port;

Remove the four screws that hold the right side plastic cover

5

Remove the washers and two remaining screws located in the

6

middle of the exposed circuit board.

Separate the two processor boards by pulling the exposed circuit
board at the backplane edge connector away from the metal cover
as you would open a book. Notice the direction in which the battery

7

cable is wrapped around the nearby standof
of the dip switch. After you separate the boards, pull the battery cable
through the battery housing (still attached to the circuit board.)

Disconnect the wires leading from the keyswitch to the stake pins on

8

the exposed circuit board.

f to prevent obstruction

.

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Enhanced PLC-5 Programmable Controller Firmware Upgrade 3

Observe

9

indicated PROMS, checking to see that the pin 1 indicators are correctly oriented.

the orientation of the pin 1 indicators before you remove each PROM. Replace each of the

For this processor:

PLC5/1

1 and 5/20 series A and C
PLC5/30 series A and C
PLC5/40, 5/60, and 5/80 series A, B, and C

Example (for PLC5/40, 5/60, and 5/80 series A, B, and C processors)

U–31

U–5

Replace these PROMs:

U70 and U61

U5 and U31

U5, U16 or U13, and U31

Skip this step if you do not have plug firmware

have received catalog number 6690DS2 PROMs with your upgrade kit. T

10

the previous procedure to remove each plug and replace the PROM in socket U7.

. If you have communication plug PROMS, you may

U–16

o update these PROMs, follow

U–7

11

Assemble the processor and check to see that it starts up properly
runs properly

. If you have any questions, call AllenBradley T

echnical Support at (216) 6466800.

. Reload your program and make certain that it

Publication17855.13 April 1996

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productivity and quality for more than 90 years. We design, manufacture and support a broad
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control devices, operator interfaces, sensors and a variety of software. Rockwell is one of the
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Publication17855.13

April 1996

Copyright

1996 AllenBradley Company

Publication17855.13 April 1996

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