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OBs in S5 to S7 Conversion

Created by: meeda at: 7/16/2014 10:07 AM (6 Replies)

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7/16/2014 10:07 AM	Rate (0)
meeda Bronze Member Joined: 6/26/2013 Last visit: 4/9/2023 Posts: 143 Rating: (4)	Hello Everyone, I am converting an S5 program and found OB21, OB22 and OB31 in it. OB21 calls FB5(COLDST) and FB6(OP1). OB22 calls FB8(SPAUS). After using S5 to S7 converter, OB21 is converted into OB101 and OB22 is commented out. In FB5, first two instructions are: : L KF +255 : T RS 96 FB6 and FB8 have simple convertible code in them. OB31 is empty and it is not called anywhere. DX0 is not present. I have to use S7-300 CPU. Kindly guide what can I do about their conversion? Regards, Rameez
	meeda_
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7/16/2014 4:23 PM	Rate (0)
Navnag Platinum Expert Joined: 11/21/2007 Last visit: 5/27/2023 Posts: 2321 Rating: (303)	Hello Which S5 CPU are you converting from ? RS is the system settings area and its addresses vary for different CPUs. Cheers Navnag
	There is no such thing as the last bug in a program There are no stubborn bugs, There are only stubborn Debuggers.
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7/17/2014 7:07 AM	Rate (0)
meeda Bronze Member Joined: 6/26/2013 Last visit: 4/9/2023 Posts: 143 Rating: (4)	Dear Navnag, The S5 SPU is115U, 942B (6ES5 942-7UB11). Regards, Rameez
	meeda_
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7/17/2014 7:41 AM	Rate (0)
Navnag Platinum Expert Joined: 11/21/2007 Last visit: 5/27/2023 Posts: 2321 Rating: (303)	Dear Rameez In S5-115U the System word RS 96 can be used by Changing the Defauly Cycle time monitoring. In you case : : L KF +255 : T RS 96 So the the Set Scan cycle monitoring time = 255 * 10 ms = 2550ms i.e. if one CPU Scan cycle is not completed in 2.55 sec the CPU will switch to stop. OB31 also serves a similar purpose. Everytime OB 31 is called in use program, the SCAN cycle monitoring timer is re-triggered. You would normally not need it in S7 program. In S7 CPUs the Scan cycle time can be set in the CPU Hardware configuration. Hope this helps Cheers Navnag
	There is no such thing as the last bug in a program There are no stubborn bugs, There are only stubborn Debuggers.
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7/17/2014 10:36 AM	Rate (0)
Marko Bursic Platinum Member Joined: 9/8/2009 Last visit: 3/15/2023 Posts: 1410 Rating: (148)	Also pay attention with analog I/Os when converting to S7, they have different scaling.

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7/17/2015 2:53 PM	Rate (0)
Min_Moderator Platinum Member Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4812 Rating: (123)	New question published by Hoa215244276 is split to a separate thread with the subject Converting s5-115u program to S7-300 fails. Best regards Min_Moderator

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3/30/2016 11:34 AM	Rate (0)
The Helping Hand Moderator Joined: 8/21/2014 Last visit: 3/24/2023 Posts: 698 Rating: (12)	New question published by Siemens automation forum is split to a separate thread with the subject Converting OBs from S5 to S7. Best regards The Helping Hand
	My Forum is the place to personalize your profile, track your topics, and maintain content that interests you. Best regards The HelpingHand
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