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Showing results for tags 'safety inputs and outputs'.
Found 34 results
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I have a CQM1-41EV controller, with 4 IA121 input modules, and 2 OC222 output modules. When in monitor mode, I can operate buttons, switces, and everthing shows that it is working. However when I go offline, and do a reboot, the outputs will not come on! What did I do wrong?
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Using RSLogix Emulate5000 with GuardLogix Safety Controllers
sundevilkz posted a topic in Allen Bradley / Rockwell Automation
Good day, We are using Guardlogix 1756-72s controllers for our ESD system. We created safety add-on instruction in RSLogix5000 v20 and wanted to test it using RSLogix Emulate 5000, however we are getting an error that safety add-on instructions are not supported in standard controllers. Is there a way to test safety code using Emualate or Softlogix? -
Hello. I tried to read/write from/to safety cpu (QS001) over MC protocol. I managed to read from cpu devices but i couldn't write to any safety cpu device. It was possible to write data to Q series plc (Q02HCPU in my example) with MC protocol. I am searching any method of writing to safety cpu (QS001). If anyone could this before? And are there any settings in GX Developer (GX works) for access to writing to QSCPU? P.S: As known it's possible to read/write from/to Q series PLC with MX Component. It's also available reading from QSCPU with MX component. But cannot write to safety cpu with MX component (written in Mx component manual). Thanks.
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I have a 16 position rotary selector switch I'm trying to program to a CQM1 PLC, that I will also be programming to a micrologix 1200 in the future, using CX Programmer. The switch connects to the PLC using 4 inputs, and activates the inputs in a binary pattern 0-16 as I turn the switch. For example: if the switch is wired to the first four inputs of the PLC, and is turned to "9" 0.0 and 0.3 will be activated and 0.1 and 0.2 will not, just like binary 9 = 1001. I have tried several things trying to get the PLC to accept these inputs as a single "data-point," and then convert to BCD or Hex to use in a timer. I'm having no luck! Does anyone have any ideas how this is done? The switch is a Tosoku DPP01 015L20RCB, and because of the age of the PLC my instruction set is limited. Thank you in advance!
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I just commissioned a system utilizing 3 1756-IRT8I TC Analog Input Modules. It was soon discovered that there were sags in the order to 2 -10 % in the inputs across all channels. These sags occurred in all three modules but at different times but were occurring more or less on ~4-6 hour intervals. There are two CJC inputs (Cold Junction Compensation) and it was discovered that one CJC value also sagged while the other one remained constant through the sags. Tech Support had no information about the issue, but eventually found that there was a thus far unannounced firmware update, that was made available. The problem modules all had FW Version 1.013 and the Update Version as of Mid Oct, 2015 is Version 1.014. Following the FW update, the sags are no longer being seen. Bob A.
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How to wire AC input just to test with switch
Damica posted a topic in Allen Bradley / Rockwell Automation
Use to working on DC inputs, now I have a PLC I am playing with and the digital inputs are AC, can I still just wire a on/off switch to complete the circuit just for testing? This is a micrologix 1100. -
CONTROLLOGIX 1756-L61S DO NOT HAVE PASSWORD - IS THERE A FIX?
sappleto posted a topic in Allen Bradley / Rockwell Automation
Several years ago before I arrived at my company, an integrator came in to do the automation on our system. They used a Controllogix 1756-L61S for the safety portion of the project. Apparently, when they completed the job they did not provide the source code with comments, safety password, etc. for anything and it got ugly between our company and theirs. In other words, they would not provide it if we went back to ask them. Allen Bradley has told us that we can not make any alterations now to the safety logic because we do not have the password that was used to create it. And they said there is no longer a master password that you could use like in previous controllers. Does anybody know of any workarounds for this? Or have heard of anything that might possibly work? -
Hi everybody, I am new in these issues and I have faced a problem that is driving me nut. I am building a mixing batch HMI and its PLC program. In my HMI I created an analog tag that stores and integer number. This tag is responsible to comunicate with an analog input of the PLC I/O expansion module, whose address is I:1.0. In my HMI I put a numerical input box to send values to this analog input, but every time I write a value in this box and press the enter key the numerical input box gets red and don't send the value to the plc. Appear the following error message "cause: Addressing problem or memory protect rungs" on the left botton corner of the HMI. Some pictures are annexed to describe better. Anybody knows what can I do? I am using PLC SLC 5/03 + Analog module 1746-NI4
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Hello everybody, I'm designing a safety system for a HV power supply. The idea is to use a series of 2 contactors to supply power to the system controlled by a safety PLC. So, it is a typical application. The problem is that the power supply and the contactors are are installed on HV platform, isolated from ground, where the PLC is installed. I think the only possibility is to use an optic fiber link. Does any body know is there is any way to connect a contactor to a PLC output using an optic fiber link, without compromise the cyclical checking performed by the safety module (as I understand, the outputs are continuously check in order to detect wire breaking). The alternative that I have is to use a distributed IO system installed on the platform, connected with a Ethernet Optic Fiber to the PLC: for example using a simens S7-400 PCL with a IM467FO modules (on ground) and a ET200M system with a IM153-2FO module on the platform. But I wonder if there is something more simple and cheaper. Thanks!
