All Questions
Tagged with plc automation
17
questions
0
votes
0
answers
35
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Control cabinet rules
I am building an electrical enclosure box equipped with a smart relay (PLC) and containing a 60W 24VDC power supply which is supplied from 230V AC. The PLC controlles a small 15W DC motor and ...
- 15
2
votes
2
answers
1k
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Difference between interlock and permissive
There seems to be somewhat differing and sometimes overlapping definitions of these terms. Below are definitions found in The Automation, Systems, and Instrumentation Dictionary, Fourth Edition by ISA....
- 121
1
vote
1
answer
95
views
How does deceleration work on a servo drive?
I'm confused by the fact that PLCopen MC-blocks used to control servo drives from a PLC have separate acceleration and deceleration parameter. For instance, MC_MoveAbsolute.
I don't understand what ...
-1
votes
1
answer
75
views
Is there any ethernet and 4G gateway for PLC? [closed]
I'm new in PLC programming and used only Siemens Logo. The problem I'm facing is that I can not find any gateway device that can directly send the data to server. I want to avoid using PC for simply ...
- 2,519
1
vote
1
answer
130
views
Delay in turning on two different start buttons in Star/Delta starter on PLC
Currently I'm working on a university project based on Star/Delta Starter on PLC.
I wrote program using LD, that switches on the circuit with a motor rotating forward (of course with star/delta ...
0
votes
0
answers
178
views
Level sensor Transmitter
I have a level sensor and transmitter(4-20mA standard) of Qidian Automation for sensing level of liquid in tank having capacity of 1000 litres. On transmitter it is displayed 0.516 when tank is half ...
1
vote
1
answer
137
views
I need to understand the circuit diagram of a Klöckner Moeller relay output unit
I am working on the automation of an old servo driven feed system for a mechanical power press. I have come across these relay output units from Klöckner Moeller (machine make year 1980`s) pictures ...
- 11
1
vote
0
answers
153
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EC and pH sensor in plc automation
I am working with automation using pH and EC sensors. Both are of 4-20mA communication standard. When at a time single sensor is placed in liquid(in 1000 litre tank) then everything works fine (...
0
votes
1
answer
122
views
Simatic Microbox PC
I just started my research studies and part of it is based on an assembly line which uses a Microbox IPC427E for automation. However, I have never used a microbox before and only have some experience ...
- 1
0
votes
1
answer
120
views
STEP7 MICROWIN PLC Ladder Diagram
I draw like the first figure in the program, but when I save the program it automatically becomes the second shape. Do the two mean the same thing?
- 3
6
votes
4
answers
6k
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Is there an open source IO-Link stack available?
I have been looking at designing a solution around an IO-link master.
Does the IO-link Consortium allow for open source implentations of both the master and slave?
The documents online seem to give ...
- 61
0
votes
1
answer
179
views
4-20mA PLC analog output ground referencing for other devices
I'm currently using a PLC to control an induction heating coil.
I'm using a chinese induction driver that allows 4-20mA PID input. This device runs off standard australian 230v AC 50hz.
I've ...
0
votes
1
answer
532
views
How do you set up a VFD to run a motor at 2 different speeds?
I'm already familiar with the concept of altering the frequency to change the speed of the motor. So in this scenario, I'm looking into running a pump at 40Hz (high speed) and 23Hz (low speed). This ...
- 347
0
votes
1
answer
651
views
Measuring sensor with two PLCs
Can I measure one sensor with two PLCs?
I have a PLC that's part of a machine manufacturing stuff.
Another PLC is part of a robotic arm that needs to grab the piece.
It would be intresting to be ...
0
votes
2
answers
485
views
PLC as gateway with TCP/IP communication stack?
I'm having issues designing an architecture for communication in a vehicle. Currently a PC is connected through a switch to a series of ECUS, each one with a TCP2CAN converter. The PC has to be ...
- 1