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Unknown Resolution in 12+1 Bit SM 1231 Module

Created by: SinclairMihoTwo at: 1/25/2022 8:47 PM (2 Replies)

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1/25/2022 8:47 PM	Rate (0)
SinclairMihoTwo Member Joined: 12/24/2021 Last visit: 3/21/2022 Posts: 9 Rating: (0)	For a S7 1215C with a SM 1231 4 AI 12 bit+ sign Module, under TIA Portal V.17, MSW 10. When applying 4.7mA and 17.3mA measured and verified with several multitesters, I obtain 6460 and 24010, respectively. I am reading at the tag "ai1000" with the Monitoring On/Off menu icon tool, configured as Int, Current, 0-20mA, Disabled Power Supply Diagnostics, Disabled Overflow Diagnostics, Disabled Underflow Diagnostics, Strong (32 cycles). How these reading should be interpreted, if 2^12=4096, 2^13=8192, and having a 1400 [b/mA] approx. factor (?) for the acquisition? Shouldn't be 4096 or 8192 for 20mA? I would be having close to 28000 for 20mA. The configuration is the 2-wire, with one Power Source, one Load with 2 wires, and the ground cables interconnected, exactly wired as shown in the picture. What is happening? Attachment S7 1200 SM1234 3 2w.png (362 Downloads)
	Last edited by: SinclairMihoTwo at: 01/25/2022 20:49:50 Last edited by: SinclairMihoTwo at: 01/25/2022 20:50:53 Last edited by: SinclairMihoTwo at: 01/25/2022 20:57:32 Last edited by: SinclairMihoTwo at: 01/25/2022 21:19:29 Last edited by: SinclairMihoTwo at: 01/26/2022 01:21:46 Last edited by: SinclairMihoTwo at: 01/26/2022 01:29:39 Last edited by: SinclairMihoTwo at: 01/26/2022 01:36:17
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1/26/2022 7:36 AM	Rate (1)
cnmautomation Experienced Member Joined: 3/2/2015 Last visit: 10/31/2024 Posts: 66 Rating: (2)	As per S7-1200 System Manual see the attached table for scaling of values. Attachment Untitled.png (382 Downloads)
	Last edited by: Jen_Moderator at: 01/26/2022 11:53:15 Optimized link. http://www.pakplc.com/
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This contribution was helpful to 1 thankful Users SinclairMihoTwo

1/26/2022 10:47 PM	Rate (0)
SinclairMihoTwo Member Joined: 12/24/2021 Last visit: 3/21/2022 Posts: 9 Rating: (0)	That explains everything...

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