Not getting much help on my other thread, perhaps it is too much in depth for anyone to have much interest. So I thought I would break each part of my project down and try and solve my problems that way.
First off I know very little about PLC’s but I’m learning.
Here is the link to my original thread if you feel like reading through it. http://www.plctalk.net/qanda/showthread.php?t=44160
Here are a couple of questions for now.
I can purchase two SLC 500 from a local demo contractor, one a 7 slot the other a 10 slot both for $100.00. Both have all Ser A components and 115Vac power supplies. They both have an I/O adaptor modules 1747-ASB and several 1746-IA16 input modules and several 1746-OA16 output modules. Would one of the PLC’s be a good starting point for building a PLC for my needs or are they too old to mess with?
I'm mostly dealing with 4-20 mA and 0-10 Vdc inputs from sensors and three float switches that can be either 24 Vdc or 115 Vac. Basically to keep track of the level and gallon per minute fill rate of a tank. I know I would still need to purchase analog modules for that. As far as outputs it will be to turn on and off a couple of valves and relays that can be either 24 or 115 V also maybe some pilot lights showing status of each if I don’t have a HMI for this.
I'm not sure if the adaptor modules are of value in my situation or the Input and output modules are either for that matter. From what I read on AB website the I/O adaptor modules are for communication with other devices. Is this how you hook up to the PLC for programming? I’m planning on having a HMI, will these I/O adaptor modules work for hooking up a HMI also?
So to recap, basically my questions are:
1. Is either of the PLC’s a good starting point for the project?
2. Are any of the modules of value to me?
3. What are these I/O modules used for?
Any help is greatly appreciated.
First off I know very little about PLC’s but I’m learning.
Here is the link to my original thread if you feel like reading through it. http://www.plctalk.net/qanda/showthread.php?t=44160
Here are a couple of questions for now.
I can purchase two SLC 500 from a local demo contractor, one a 7 slot the other a 10 slot both for $100.00. Both have all Ser A components and 115Vac power supplies. They both have an I/O adaptor modules 1747-ASB and several 1746-IA16 input modules and several 1746-OA16 output modules. Would one of the PLC’s be a good starting point for building a PLC for my needs or are they too old to mess with?
I'm mostly dealing with 4-20 mA and 0-10 Vdc inputs from sensors and three float switches that can be either 24 Vdc or 115 Vac. Basically to keep track of the level and gallon per minute fill rate of a tank. I know I would still need to purchase analog modules for that. As far as outputs it will be to turn on and off a couple of valves and relays that can be either 24 or 115 V also maybe some pilot lights showing status of each if I don’t have a HMI for this.
I'm not sure if the adaptor modules are of value in my situation or the Input and output modules are either for that matter. From what I read on AB website the I/O adaptor modules are for communication with other devices. Is this how you hook up to the PLC for programming? I’m planning on having a HMI, will these I/O adaptor modules work for hooking up a HMI also?
So to recap, basically my questions are:
1. Is either of the PLC’s a good starting point for the project?
2. Are any of the modules of value to me?
3. What are these I/O modules used for?
Any help is greatly appreciated.