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Force variables in with STEP 5

7/13/2007 3:36 AM	Rate (0)
Damian_2007 Posts: 21 Rating: (0)	Hi: I can NOT force a variable (a mark, M125.0 for example) in a CPU 155U in RUN Mode with the STEP 5 software (Ver. 7.23). I know that I have to use the Test and list in a BB (Image Block) the mark in BYTE format and force the bit that I want to 1, but inmediatly it goes to 0. I read the STEP 5 manual, and I´m follow the instruccion in the TEST section. Is There an special condition or something else to do that ? I hope you help me. Its necesary to force the complete byte ??? Thanks Best Regards. Damián
Damian_2007 Posts: 21 Rating: (0)	Last edited by: Damian_2007 at: 13.07.2007 03:59
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7/13/2007 10:39 AM	Rate (0)
Mvlc Posts: 5 Rating: (0)	It's because the plc program is resetting the marker again after you force it.
Mvlc Posts: 5 Rating: (0)
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7/13/2007 4:18 PM	Rate (0)
Damian_2007 Posts: 21 Rating: (0)	Hi Mvlc: It is not posible becausethe complete byte MB125 is not use in the program. The 8 marks ( M125.0 - M125.7) Thanks and best regards. Damian
Damian_2007 Posts: 21 Rating: (0)
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7/14/2007 7:13 PM	Rate (0)
Late Platinum Member Joined: 1/7/2006 Last visit: 5/11/2025 Posts: 2705 Rating: (321)	Hi, Consider that MB125 is the same as the booleans M125.0....M125.7
	I hope that the answer will help, if you have still questions, don't hesitate to ask me. All the best, Late Never say never, think in solutions, not in trouble......
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7/14/2007 10:34 PM	Rate (0)
Alex_S Posts: 5 Rating: (0)	Hi, You are right, in step5 you have to operate with byte. You force variable select MY125 in KM format, change bit 0 and force it. BR.
Alex_S Posts: 5 Rating: (0)
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