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|June 30th, 2012, 03:08 PM||#1|
Join Date: Jun 2012
Allen Bradley RIO
I have looked through prior threads and think I have found the answer in a 2002 post but I'm going to post my problem anyway and see what you guys think.
I have a SLC 500 (5/04) in a 10 slot rack, in slot 9 I have a 1747-SN.
The remote module is a 10 slot chassis with a 1747-ASB in slot 0, it has a 4 channel analog input card in slot 1, 4 channel analog output card in slot 2, a 120 volt 16 point digital input card in slot 3 and a 8 point digital output card in slot 4 that is DC i believe.
Here is the issue, SN card Comm flashes red, ASB card flashes green but displays ADE. This unit was set up about ten years ago and not by me or the company I work for, I don't know how long its been down to be honest but I need it up now because I need to read my DI's for a new purpose. Nothing is wired to the analog I/O's or the 8 point output card. But I can't read my DI's.
The G file is set up as rack 0, group 0 = full rack, I know that on the ASB my switches are as follows:
I can get this info in a few days for switch 2 & 3 but I honestly can't remember and right now I'm not on site. Do you guys have an idea to my problem? Blue hose is good but no resistors were installed, I don't know for sure what switch 2 & 3 should be either.
This problem eluded me all day yesterday and I hate to spend months trying to resolve it the cabinet was built for future growth but if I can't get RIO working I'm thinking of changing out the ASB to a processor and doing away with the SN and putting that chassis on the DH+ with the rest of the SLC's.
Thanks for your help, I wish I was a little more familiar with RIO but I haven't had a bunch of experience with it.
|June 30th, 2012, 03:53 PM||#2|
Lifetime Supporting Member
It will be pretty hard for anybody to troubleshoot your systems with the info given.
Those that can help will need the dip switch positions on both modules.
You should install the termination resistors.
See links below for the manuals.
If you want happiness for an hour-take a nap. If you want happiness for a day-go fishing. If you want happiness for a month-getmarried. If you want happiness for a year-inherit a fortune. If you want happiness for a lifetime-help someone else.
----- Chinese Proverb
|June 30th, 2012, 04:38 PM||#4|
Lifetime Supporting Member + Moderator
I had a similar setup once. The remote rack would sometimes lose power to the PLC CPU. This would cause loss of communications to the main SN module and somehow lock it out so that it would not ever restablish communications. To get it to work, you have to somehow reset everything. Kill power to both the main and remote, then restore the remote power, get it switched to RUN mode with no faults, then turn on the main PLC, switch it to RUN mode. Often this clears up the problem.
|July 1st, 2012, 01:28 PM||#6|
Lifetime Supporting Member + Moderator
Sw1: 11111111 Rack 0, Starting Group 0
Sw2: 01011100 230.4 kb/s, default Complementary chassis, 8 Group Size
Sw3: 01110101 Do not hold last state, Automatic Restart, Default Link Response Time, Not Last Chassis (default), 1/2 Slot Addressing, Block Transfer for Specialty Modules, Keying Saved
Slot 0 1747-ASB
Slot 1 1747-NI4
Slot 2 1747-NO4I
Slot 3 1747-IA16
Slot 4 1747-OB8
Slot 5,6,7,8,9 empty
The "1/2 Slot" Addressing Mode, along with Slot Pairing, allows you to operate 4-channel analog modules without block transfers, which is probably why the 1747-ASB was configured that way. This is described in the User Manual starting on page 3-10.
You should change SW3-7 to "Discrete Transfer" mode to go along with this configuration.
With the chassis defined as 8 Groups, and configured with 1/2 Slot Addressing, those four slots make up one Logical Rack.
A Logical Rack is 8 words of Input Data and 8 words of Output Data. Because the 1747-SN is in Slot 9 of your CPU chassis, these should be addressed as:
I:9.0 Analog Input Channel 0
I:9.1 Analog Input Channel 1
I:9.2 Analog Input Channel 2
I:9.3 Analog Input Channel 3
I:9.4 AC Input Bits 0-15
I:9.5 Reserved for previous slot
I:9.6 Not Used
I:9.7 Reserved for previous slot
O:9.0 Analog Output Channel 0
O:9.1 Analog Output Channel 1
O:9.2 Analog Output Channel 2
O:9.3 Analog Output Channel 3
O:9.4 Not Used
O:9.5 Reserved for previous slot
O:9.6 DC Output Bits 0-7
O:9.7 Reserved for previous slot
None of this explains the "AdE" code, though.
I suspect this RIO link was never in use; check the Slot Enable bits in the SLC-500 Status file to make sure Slot 9 is enabled.
- "Simpler is better, except when complicated looks really cool."
|July 1st, 2012, 01:37 PM||#7|
Join Date: Jun 2012
Thank you for clarifying some things Ken I was getting a little confused in AB's documents, I think that I checked slot enable on Friday but I will double check it tomorrow. I hope that I can get it talking Monday, I'm sure it's something simple to fix but it has me buffed and that's why I turned to the forums. You guys are throwing out some good ideas that I hadn't thought off and I do appreciate it.
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