Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
(OP)
I posted this on another Forum and have not gotten any responses. Hope I am not violating any rules or forum etiquette by reposting here. I am just looking for some ideas and answers.
We have many Allen Bradley ArmorStart 284G VFD drives. Each controls a motor that is used on a Power Roller Bed. The rollers on the PRB move car-carrying skids. These A/B 284G drives are on a DeviceNet network. We have an A/B PLC 5000 that sends the signals or commands, via DeviceNet, to VFD to make rollers turn, control speed, release motor brake, etc...
Recently we had contractors working in our automated Cells. They needed to move some steel into a Cell and the only way was to load it on an empty Skid and jog it to where they wanted it to go. Because things were partially torn apart the DeviceNet network was not working. So I could not do the normal jogging or moving of a Skid. In the end the contractors released motor's manual brake, laid on floor, with body partially under lift table, they spun the Roller Bed motor using a Drill motor. They were able to slowly move Skid and get material to destination. There has got to be a better and safer way.
My question is: Do any of you know of a way I could command VFD to run motor and have control of speed and break when DeviceNet is not working? Is there a hand held device that I could hook up to drive and jog it? Our ArmorStart 284G drives have no manual jog on them. Do any of you know of a way I could command VFD to run motor and have control of speed and break?
We have many Allen Bradley ArmorStart 284G VFD drives. Each controls a motor that is used on a Power Roller Bed. The rollers on the PRB move car-carrying skids. These A/B 284G drives are on a DeviceNet network. We have an A/B PLC 5000 that sends the signals or commands, via DeviceNet, to VFD to make rollers turn, control speed, release motor brake, etc...
Recently we had contractors working in our automated Cells. They needed to move some steel into a Cell and the only way was to load it on an empty Skid and jog it to where they wanted it to go. Because things were partially torn apart the DeviceNet network was not working. So I could not do the normal jogging or moving of a Skid. In the end the contractors released motor's manual brake, laid on floor, with body partially under lift table, they spun the Roller Bed motor using a Drill motor. They were able to slowly move Skid and get material to destination. There has got to be a better and safer way.
My question is: Do any of you know of a way I could command VFD to run motor and have control of speed and break when DeviceNet is not working? Is there a hand held device that I could hook up to drive and jog it? Our ArmorStart 284G drives have no manual jog on them. Do any of you know of a way I could command VFD to run motor and have control of speed and break?





RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
I'm not familiar with a 284G VFD specifically but I've never seen a general purpose VFD that you could not command motions with alternatively. You would however need a manual and typically change the parameter that directs 'what' controls the VFD to the user panel on the drive. Then you should be able to jog and run the drive easily. Just remember what you changed and, of course, change it back when you're done.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
That however is not a field installable accessory, although you may be able to send them it to the factory to have it added.
But the ArmorStart does not have any digital I/O built-in, it is intended for network control only (other than the HOA option). So there is nothing to wire a separate "Jog" button to.
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
There must be a way – I think? All I have access to on the ArmorStart 284G Drive is a “RESET” button. There are no “JOG” or “RUN” buttons. All the VFD commands are sent and received via DeviceNet and if the network is down and not working how do I make the desired motor run?
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
We don't have that keypad that you displayed. So, let me ask does Allen Bradley makes a hand held device I could hook up to DeviceNet port to gain control?
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
Is there anything that you can use with a laptop?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
Perhaps this could also be used as a backup if one of the installed ones fails.
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
It so amazes me that I have to wonder if anyone uses Devicenet anymore or if it's pretty passé by now.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
The installed base of DeviceNet networks is huge here in North America, but yes, it's use is waning as far as new installations go. DeviceNet was a good response to an old problem involving networking of industrial controls because of our (North American) rules on wire insulation values; that all cables in a common raceway or enclosure must have the same insulation rating. So if you have 480V anywhere, the insulation is rated 600V, so any networking cables must also be rated for 600V. DeviceNet provided that, along with a simple 2 wire transmission system, where other networks did not (ProfiNet did as well, but never caught on here like it did in Europe and elsewhere). DeviceNet was, however, difficult to implement (in my opinion) compared to other things we were all used to, such as Ethernet. The advancement of Ethernet infrastructure into the 600V realm has all but killed any excitement about starting something new with DeviceNet now.
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
If it is anything like CAN, trying to cater for the myriad of COBs for every device and platform would likely exclude any possibility of a generic DeviceNet hand controller.
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
The 4 DI's are connected to M12 connectors on the front, 2 connectors with 2 DIs in each one plus an on-board 12VDC source for them, so you need DRY contacts that are OK with low votlage. So if you are not using those for anything else, you could use one of them to command a Jog function by assigning the DI that you chose (parameters 151-154) to be a "Jog" input (value of "2"). I'm not 100% sure, but it appears that this will override the network Run / Speed command as long as it is High, but when you release it, the motor will Stop and something (i.e. the network) will be required to initiate a new Run command afterward.
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Can you jog an A/B ArmorStart 284G Drive controlled motor when it's DeviceNet network is not working
It looks as if an M12 connector and a push button will solve the problem.
lps
Bill
--------------------
"Why not the best?"
Jimmy Carter