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Problem with RTD module SM 1231

Created by: dilip_123 at: 7/19/2010 10:54 AM (8 Replies)

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7/19/2010 10:54 AM	Rate (0)
dilip_123 Posts: 73 Rating: (0)	Dear all, Iam using SM 1231 RTD module & it is configured as PT 100 thermal resistor 2 wire system. But when it is connected to rtd module, a red light is blinking in CPU & RTD module. I check the wiring, it is correct. I measure the resistance and the value is 132.3 ohm. So please reply . Thanks
dilip_123 Posts: 73 Rating: (0)
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7/19/2010 1:08 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 11/4/2024 Posts: 4351 Rating: (1452)	dilip_123 Dear all, Iam using SM 1231 RTD module & it is configured as PT 100 thermal resistor 2 wire system. But when it is connected to rtd module, a red light is blinking in CPU & RTD module. I check the wiring, it is correct. I measure the resistance and the value is 132.3 ohm. So please reply . Thanks Please, show us your wire diagram, a print screen of the device and the printscreen of the online diagnose of the module.
	Denilson Pegaia Siemens Industry Sector Technical Support
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7/19/2010 1:29 PM	Rate (0)
dilip_123 Posts: 73 Rating: (0)	Dear sir I will be verythankfull to you that you reply me. I have attached the wiring connection and arrangement of this module. Currently iam not connected to plc so i can't send the diagnosis screen. But the message appearing in the diagnosis screen is "Low limit voilated" I measure the resistance across theRTD which is 132 ohms. Please reply sir, Attachment 1RTD modules.jpg (769 Downloads)
dilip_123 Posts: 73 Rating: (0)
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7/19/2010 5:17 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 11/4/2024 Posts: 4351 Rating: (1452)	Hi, the "Low limit" refer to channel 0 or channel 1 (or both)?
	Denilson Pegaia Siemens Industry Sector Technical Support
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7/20/2010 9:51 AM	Rate (0)
dilip_123 Posts: 73 Rating: (0)	sir, This low limit refer to channel 0. thanks
dilip_123 Posts: 73 Rating: (0)
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7/20/2010 4:05 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 11/4/2024 Posts: 4351 Rating: (1452)	Hi, the connections seens good. Now we need to see the configuration offline/ diagnostic online...
	Denilson Pegaia Siemens Industry Sector Technical Support
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7/22/2010 2:45 PM	Rate (2)
trennr Posts: 2 Rating: (2)	Just to clarify. Does your Wiring look similar to the attached picture? This is the proper wiring method for a 2-wire RTD application. Attachment RTD2W.jpg (745 Downloads)
trennr Posts: 2 Rating: (2)	Last edited by: trennr at: 7/22/2010 2:51 PM
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This contribution was helpful to 1 thankful Users billwest

4/22/2015 3:17 PM	Rate (0)
Min_Moderator Platinum Member Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4766 Rating: (122)	New question published by voliem62 is split to a separate thread with the subject Problem with modul RTD sm1231. Best regards Min_Moderator

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7/31/2017 11:33 AM	Rate (0)
Jen_Moderator Diamond Member Joined: 6/19/2017 Last visit: 9/6/2024 Posts: 8175 Rating: (172)	New question published by mxiaoxi is split to a separate thread with the subject 3 PT100(2 wires) connected to module SM1231 - 3 PT100 seems to be in parallel condition.. Best regards Jen_Moderator

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