5/10/2023 10:47 AM | |
Joined: 10/2/2016 Last visit: 8/15/2024 Posts: 14 Rating:
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Dear All I am currently trying to configure my S7-1500 CPU to read a 4-20mA value at channel 1 Analog Input Card Module (6ES7531-7KF00-0AB0) 4 wire transducer type to read a 4-20mA and display it on a scada screen. My network are as follow S7-1500 CPU+PS 24VDC connect with Distributed IO ET200MP Interface Module Profinet via Switch network hub. The ET200MP also has various module connected to it such as 6ES7531-7KF00-0AB0 8AI Card and a 8DI & 8DQ card. My Problem face are as follow TIA Portal analog input show a constant 32767 (prior NORM_X and SCALE_X) regardless if there is an 4-20mA value injected into channel 1 or not. Apparently I am facing issue with "Supply Voltage Missing" at Channel 1 which according to diagnostic show "No Supply Voltage at L+" (the LED indicator of channel 1 will blink red) Attachment show 3 picture, the first picture shows the connection of an 4-20mA injector inject into channel 1. The 2nd picture shows the measured 24VDC from point L+(41,42) M(43 & 44) thus providing necessary power to analog module. Has any one face the issue where either one of AI channel has a "No Supply Voltage at L+" error even though there L+ and M are connected (shown in picture number 2 with multimeter) if so what are your remedy on how to resolve TIA not able read the analog input channel Thanks in Advance Foo Brandon Attachment6ES7531-7KF00-0AB0.pdf (487 Downloads) |
5/10/2023 10:54 AM | |
Joined: 7/19/2022 Last visit: 8/23/2024 Posts: 380 Rating:
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Hello BrandonFoo, It is indicating a power failure on channel 0. I recommend that you disable the channels you are not using. |
If this Information really helps, you could use the Rate function |
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5/10/2023 11:44 AM | |
Joined: 10/2/2016 Last visit: 8/15/2024 Posts: 14 Rating:
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Dear JBS98 Thanks for the prompt reply Can you please elaborate more on the power failure on Channel 0. I have did a prior test on using similar circuit connection and it work out perfectly. But this time i encounter this problem. In my prior test i did not enable this Diagnostic error "No Supply Voltage L+ setting", this time i enable it the diagnostic error i encounter this error. sincerely Foo Brandon |
5/10/2023 12:07 PM | |
Joined: 7/19/2022 Last visit: 8/23/2024 Posts: 380 Rating:
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Okay, I understand. Your sensor is a 2-wire intensity sensor, right? If so for channel 1 must be connected the + to pin 5 and the - to pin 6 as indicated in the manual, do you have it that way (I can't see the pins very well in the document sent, sorry)? SIMATIC S7-1500/ET 200MP Analog input module AI 8xU/I/RTD/TC ST. Wiring |
If this Information really helps, you could use the Rate function |
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5/10/2023 1:19 PM | |
Joined: 7/19/2022 Last visit: 8/23/2024 Posts: 380 Rating:
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Hello again BrandonFoo, Ok, so now you have the channel configured as 4-wire. Are you connecting the + wire from the sensor to pin 5 and the - pin from the sensor to pin 7 and then powering the sensor correctly with 24V or whatever voltage it needs? |
If this Information really helps, you could use the Rate function |
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5/10/2023 1:57 PM | |
Joined: 10/2/2016 Last visit: 8/15/2024 Posts: 14 Rating:
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This is the final output shown in red box the value is showing a constant of 16#7FFF or 32767 value in decimal Please reply as soon as possible sincerely Foo Brandon AttachmentDoc1.pdf (393 Downloads) |
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