Answer / a k gunjariya

If DO Module is OFF in system cabinets:
1.) Check status of the 24 V Power Supply (power supply LED
on the module)
2.) IF No LED is glowing then module is not getting power
supply.
3.) if power supply led is glowing then check any of the
Digital Output signal by simulating input.

Answer / ahmed samy

Make forcing from PLC programming software to any output Channel in that DO, if output is on, LED is on means module is ok, otherwise it's faulty.

Other idea, is to replace module with similar one in the rack, if it's still off in second position that means it has a problem

What are the uses of orifice plates?

0 Answers  

---

what is the principal of operatio of dc motor

1 Answers  

---

what is the difference between the microcontroller and PLC?

9 Answers   HAL, Havells,

---

In control valves (like feed water control valve) we will give 3 kg pressure and how it controls 110 kg of water pressure?

4 Answers   SSL,

---

How can SmartPlant Instrumentation users take advantage of these global services?

1 Answers  

---

---

Valve positioner and actuators in detail.

0 Answers   MIEPL,

---

what is XV and KV valves?

4 Answers  

---

cascade controller is feed back or feed forward or both

4 Answers  

---

what is exat meaning of compentation in RTD ? what diffrent between 2 wire,2 wire and 4 wire RTDs?

2 Answers   Atul, Vardhman,

---

What's the Installtion procedure of DP Transmitter for Gas,steam and water?

2 Answers  

---

what is the difference between laminor flow and turbulant flow

2 Answers   Invensys,

---

why we use cascade control and feed foreword control in 3 element control of boiler drum ?what is feed forward and cascade control system ?

0 Answers   Visa Steel,

---