Rockwell Automation 1785-L11B, 1785-L20B, 1785-L30B, 1785-L40B, 1785-L40L User Manual
...
Installation Instructions
Enhanced PLC5
Programmable Controller
Firmware Upgrade
(Catalog Numbers 1785-L11B, -L20B, -L30B,
-L40B, -L40L, -L60B, -L60L, -L80B)
Using These Instructions
AB
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.
Publication17855.13 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 PLC5/1
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 PLC5/1
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 PLC5/40 and 5/60 processors.
1 or 5/20 processor
1 or 5/20 processor
.
.
.
channel 0 serial port
channel 1A status indicator
8pin miniDIN, 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
.
Publication17855.13 April 1996
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