We have a SRVO-007 error but nothing I have tried yet has had any effect. Swapped out teach pendant and TP cable with no change. Also tried exchanging the E-stop unit in the lower right. (RJ3iB controller) the teach pendant stop and controller stop work like normal but the error still won't go away.
SRVO-007 error alone, no seeming fix
- EPeters1
- Thread is Unresolved
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Please post the entire error message.
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Have you even checked the External Emergency Stops that are installed instead of diving into replacing boards as that is what the error is reporting.
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yes, the first thing i did is to hit every emergency stop button individually, reset them and check the error. no change
That's not how to check emergency stop buttons.
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Get an electrician to disconnect the external emergency stop circuit inputs to the controller and apply jumpers to the external inputs correctly.
This will rule in or out external influence to the circuit.
If the error still remains and cannot be reset, then it is a controller issue.
If the error clears, then your electrician needs to investigate the external emergency stops and wiring.
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Well, that sucks
Safety errors are there for a reason and safety related errors fail safe to ensure nothing can move, energise before being investigated and resolved.
So what else can be done:
- Stroke the controller and ask it to automatically fix itself.
- Drop to your knee's and pray for the pixies to come and fix it.
- Start randomly pulling boards and replacing them instead of troubleshooting the error effectively.
Without knowing your setup, it could be ALL your external emergency stops are wired in series directly to the external emergency stop inputs, or to a safety device or to individual safety devices or a safety PLC and controlling the external emergency stop input circuits from those devices.
It could be:
- Those devices are not getting the correct signals from the field and therefore not allowing the external emergency safety circuit to register a working safety circuit.
- Your field devices are providing the correct inputs to the safety devices and one of those safety devices is not allowing the external emergency safety circuit to register a working safety circuit.
- ALL your field devices and safety devices are working and wiring is good and that the controller internal has a hardware issue.
By removing the external emergency stop input wiring from the field to the dedicated external emergency stop inputs on the controller and inserting the correct jumpers will prove whether it is field related or controller related.
When you know this, then you have a dedicated path of further investigation.
Unless you are electrically qualified, competent and allowed to undertake those tasks, then an electrician is required to troubleshoot the issue.
If you are competent and authorized then you could carry out the work yourself by locating the external emergency stop inputs on the E-Stop Unit.
You could also look in the error history and there may also be additional information in there to assist in troubleshooting including the full error message that HawkME kindly suggested.
Whether you like it or not, that is how it is.
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Do these controllers have a door switch fitted which generates this error if:
- Door is opened.
- Door switch has failed.
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Display More
Safety errors are there for a reason and safety related errors fail safe to ensure nothing can move, energise before being investigated and resolved.
So what else can be done:
- Stroke the controller and ask it to automatically fix itself.
- Drop to your knee's and pray for the pixies to come and fix it.
- Start randomly pulling boards and replacing them instead of troubleshooting the error effectively.
Without knowing your setup, it could be ALL your external emergency stops are wired in series directly to the external emergency stop inputs, or to a safety device or to individual safety devices or a safety PLC and controlling the external emergency stop input circuits from those devices.
It could be:
- Those devices are not getting the correct signals from the field and therefore not allowing the external emergency safety circuit to register a working safety circuit.
- Your field devices are providing the correct inputs to the safety devices and one of those safety devices is not allowing the external emergency safety circuit to register a working safety circuit.
- ALL your field devices and safety devices are working and wiring is good and that the controller internal has a hardware issue.
By removing the external emergency stop input wiring from the field to the dedicated external emergency stop inputs on the controller and inserting the correct jumpers will prove whether it is field related or controller related.
When you know this, then you have a dedicated path of further investigation.
Unless you are electrically qualified, competent and allowed to undertake those tasks, then an electrician is required to troubleshoot the issue.
If you are competent and authorized then you could carry out the work yourself by locating the external emergency stop inputs on the E-Stop Unit.
You could also look in the error history and there may also be additional information in there to assist in troubleshooting including the full error message that HawkME kindly suggested.
Whether you like it or not, that is how it is.
I did include the full error message. The full error message is SRVO-007 External Emergency Stops
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Have you gone into the MENU and ALARM and seen any other information in there?
You could take a snapshot of it and post it, there may be additional information in there that may direct you further.
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Below is an example of a single emergency stop button wired:
DEPENDING ON COMPANY RULES, AUTHORIZATION MAY BE REQUIRED IN ORDER TO BRIDGE SAFETY.
DO NOT BRIDGE ANY OTHER CONNECTIONS OR CROSS BRIDGE.
NEVER OPERATE THE SYSTEM WITH BRIDGES INSERTED, ONLY BRIDGE AS PART OF TROUBLESHOOTING.
REMOVE ANY/ALL BRIDGES BEFORE RETURNING THE SYSTEM TO OPERATION.
The circuit is simple to bridge, just make sure you turn off and isolate power to the controller first.
Make a note of the existing 4 wires, remove them, terminate them/isolate them into a connector block.
Apply bridges and then power on.
- EES1 to EES11
- EES2 to EES21
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Well that suggests there is an issue with the key switch, or during your swapping, the key switch circuit is disconnected.
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Hadn't swapped yet or touched the key switch at all and I have turned it on several times after Fridays swapping without the error appearing.
So what does that mean exactly, any other information in the alarm screen, NTED alarms etc?
Just because it has appeared and didn't before, just ignore it and hope it's just the controller making random alarms for the fun of it and say you have never done anything.
It's not a blame game.
Please apply some common sense:
- Could the switch suddenly have failed.
- Could the switch be contaminated - maybe worth blowing it/switch cleaner and toggling it a few times.
- Could there be a loose connection.
- Could you have disrupted anything during any random swapping of boards/components.
Get an electrician in and look at it all, before more issues suddenly appear.
You'll probably find there is a common cause to this, like power supply rails/overload.
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