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Expanding LOGO block numbers

Created by: Iman_Hz at: 10/23/2015 6:34 PM (16 Replies)

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10/23/2015 6:34 PM	Rate (0)
Iman_Hz Posts: 37 Rating: (0)	Hello, As I know, the maximum number of function blocks in a LOGO 8 program is 400. Is there anyway to expand this number (possibly by inserting a MMC) or it is limited? Thanks.
Iman_Hz Posts: 37 Rating: (0)	Last edited by: Iman_Hz at: 10/23/2015 6:34:56 PM
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10/23/2015 6:49 PM	Rate (0)
William_B Posts: 5225 Rating: (1182)	Iman_Hz Hello, As I know, the maximum number of function blocks in a LOGO 8 program is 400. Is there anyway to expand this number (possibly by inserting a MMC) or it is limited? Thanks. Network to a second LOGO.
William_B Posts: 5225 Rating: (1182)
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This contribution was helpful to 1 thankful Users Iman_Hz

10/27/2015 1:11 PM	Rate (1)
Helmut_13 Posts: 2930 Rating: (432)	Hi, here a hint how you can "save" block because 400 is max. If you inset a FB then on the left hand side you can find the inputs of the FB. If you move your cusror to one of the FB inputs and then press the right mouse button you can "invert" the signal. Lots of LOGO! programmer don't know this feature and they normally use "NOT"-FB for this feature (B002). So look in your program if you also use NOT-FB's and replace it by inverting the inputs of the following FB. Inverting of FB inputs are not counted as FB. Here a picture how it looks like: Hope this helps.
Helmut_13 Posts: 2930 Rating: (432)
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This contribution was helpful to 1 thankful Users Iman_Hz

10/30/2015 5:38 PM	Rate (0)
Iman_Hz Posts: 37 Rating: (0)	Many Thanks
Iman_Hz Posts: 37 Rating: (0)
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10/31/2015 12:52 AM	Rate (0)
Jaime García Advanced Member Joined: 8/27/2015 Last visit: 2/11/2022 Posts: 5 Rating: (4)	Other easy hint to save one block.

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10/31/2015 6:18 AM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 12/11/2023 Posts: 31603 Rating: (3930)	No that's not right. The high-block and low-block are constants and not function blocks.

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10/31/2015 12:58 PM	Rate (0)
ANKURGAMIT Silver Member Joined: 10/2/2013 Last visit: 11/23/2023 Posts: 339 Rating: (51)	if problem remain same (without use of invert block) with inverting input you should replace plc with other series as s7 200 or other
	PROBLEMS ARE OUR ASSEMBLY POINTS. SO WE THANKS TO PROBLEMS.
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10/31/2015 1:42 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 12/11/2023 Posts: 31603 Rating: (3930)	ANKURGAMIT if problem remain same (without use of invert block) with inverting input you should replace plc with other series as s7 200 or other What you have posted, has nothing to do with the Topic.

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12/20/2015 11:35 PM	Rate (0)
fdag1 Advanced Member Joined: 8/6/2008 Last visit: 2/4/2023 Posts: 36 Rating: (1)	William_B Network to a second LOGO. Can there be more than 1 master logo in a configuration? The master logo is the one executing user program. You can add slave logo's in a configuration, they are used for extending IO's. They do not execute user program.

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12/21/2015 7:12 AM	Rate (0)
William_B Posts: 5225 Rating: (1182)	fdag1 William_B Network to a second LOGO. Can there be more than 1 master logo in a configuration? The master logo is the one executing user program. You can add slave logo's in a configuration, they are used for extending IO's. They do not execute user program. Yes there can be more than 1 master. More than that.... When we say "slave" it talks only of the communication relationship between the LOGO! units. It says nothing of how the program looks like. That means you can have a distributed control. Each unit can control its own local area and you can exchange (communicate) relevant information between them to bind together what applies globally. When saying "slave" or "master" it is about the communication and not about the control. You can have more than one master but you do not have to. Helpful? w
William_B Posts: 5225 Rating: (1182)
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