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Modbus TCp Wizard - Cannot detect existing configuration

Created by: Navnag at: 3/10/2014 6:47 PM (3 Replies)

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3/10/2014 6:47 PM	Rate (0)
Navnag Platinum Member Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308)	Hello Experts I am using Modbus TCP/IP on IM151-8 for communication with a Schneider PLC. When I use the Modbus TCP Wizard the first time, I am able to create the MODBUS_PARAM Data Block. However If I open the same project agaon to change any settings, It does not show me the existing configuration. The Only way I can modify the configuration, is to delete the existing MODBUS_PARAM DB and Run the Wizard again to create the DB. How can I solve this problem ? Thanks 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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3/10/2014 7:08 PM	Rate (0)
Wüstenräuber Gold Expert Joined: 10/3/2008 Last visit: 12/3/2024 Posts: 965 Rating: (127)	Hi, normally an existing DB is read in into the wizard. Which version of STEP7 do you use? And which version of the wizard? Did you change the DB manually? Wüstenräuber

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3/11/2014 6:02 AM	Rate (0)
Navnag Platinum Member Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308)	Hello Wuestenraeuber We are using the FOllowing Software Versions : 1. STEP7 Professional V5.5+SP3 2. Mobus TCP/IP for PN CPU V 2.4 ( from CD Received ) 3. Modbus TCP Wizard V1.4.1 ( Downloaded from Support ) NO we didi not manually change the MODBUS_PARAM DB. If fact we create the DB using wizard and immediately restart the Wizard, it still does not detect the DB just created, although DB exists in the STEP7 program and also works normally. The only change we did was that we re-numbered the DB2 and DB3 as DB 102 and DB 103 as DB2 & DB3 were already in use in our progrem. Regards 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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3/11/2014 8:36 AM	Rate (0)
Navnag Platinum Member Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308)	Hello Wuestenraeuber The Problem got solved after we executed "Check Block Consistancy" and "Compile All" No errors were noticed in Compile. Now the Wizard is detecting the DB. Thanks & Regards 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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