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Output of s7300 plc

Created by: freeze12 at: 2/22/2013 10:35 AM (21 Replies)

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2/22/2013 10:35 AM	Rate (0)
freeze12 Posts: 36 Rating: (0)	Dear all I have a s7300 plc having cpu 314 c2-dp. It has 24 built-in digital inputs and 16 digital outputs. I successfully program it in simatic manager, but the problem is that the cards seem to have no connection with the cpu(although they are built-in within the cpu). No light will glow to indicate the status of any digital output when they are energized. Also input card is not reading the input. Although the ladder diagram shows the high or low status of output, but i cannot read from input nor get any physical output at the card. I have tried very hard but still no results. Any suggestions about card fault diagnosis? Regards Freeze
freeze12 Posts: 36 Rating: (0)
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2/22/2013 11:51 AM	Rate (1)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 12/13/2024 Posts: 5697 Rating: (715)	Hello, Make sure you have the right addressing, look in your hardware config. Standard i believe the digital I/O start at adress 124. Did you connect the 24 V supply to the I/O cards? For connection details: SIMATIC S7-300 CPU 31xC and CPU 31x: Technical specifications Regards, Marcjan
	Last edited by: Marcjan at: 2/22/2013 12:03 PM Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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2/22/2013 12:32 PM	Rate (1)
Ayman Elotaify Platinum Expert Joined: 5/28/2008 Last visit: 1/2/2025 Posts: 4518 Rating: (841)	Hello, Did you connected the power feeding for integrated IOs of this CPU?
	Ayman Elotaify
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2/22/2013 11:30 PM	Rate (1)
Ton Verra Gold Member Joined: 4/20/2007 Last visit: 12/13/2024 Posts: 728 Rating: (43)	As mentioned above, you need the 24 VDC and M signals. On your PLC these connections are numbered as: 24 VDC 1L+, 2L+ and 3L+ 0 VDC 1M, 2M, 3M and 4M

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2/24/2013 9:15 AM	Rate (0)
freeze12 Posts: 36 Rating: (0)	Marcjan Hello, Make sure you have the right addressing, look in your hardware config. Standard i believe the digital I/O start at adress 124. Did you connect the 24 V supply to the I/O cards? For connection details: SIMATIC S7-300 CPU 31xC and CPU 31x: Technical specifications Regards, Marcjan Dear Marcjan Thankyou for your help but I am having no problem in the simatic manager. I have done all the hardware configuration in the Simatic manager. Address for input realy starts from 124 to 126, but problem is with the card somehow i cannot figure out what. Regards Freeze
freeze12 Posts: 36 Rating: (0)	Last edited by: freeze12 at: 2/24/2013 9:23 AM
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2/24/2013 9:17 AM	Rate (0)
freeze12 Posts: 36 Rating: (0)	Ayman Elotaify Hello, Did you connected the power feeding for integrated IOs of this CPU? Dear Ayman Elotaify I have powered up the cpu, but for integrated card I donot know where to connect the feeding power. Can you explain more please? Regards Freeze
freeze12 Posts: 36 Rating: (0)	Last edited by: freeze12 at: 2/24/2013 9:22 AM
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2/24/2013 9:22 AM	Rate (0)
freeze12 Posts: 36 Rating: (0)	Ton Verra As mentioned above, you need the 24 VDC and M signals. On your PLC these connections are numbered as: 24 VDC 1L+, 2L+ and 3L+ 0 VDC 1M, 2M, 3M and 4M Dear Ton Verra Can you please refer some manual or some sort of documentation for this? Because a few days ago i discussed this problem with a guy on internet and he told me that you donot need additional power for integrated cards. They draw it from cpu. Obviously this didnot solve the problem. I guess now I should be working on feeding power for integrated I/O cards Regards Freeze
freeze12 Posts: 36 Rating: (0)
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2/24/2013 9:27 AM	Rate (1)
umencho Diamond Member Joined: 3/21/2006 Last visit: 1/14/2025 Posts: 10239 Rating: (1182)	Hello, For sure you need power supply for inbuilt I/O. Basically TonVeera suggestion is correct. Wiring of DI/DO - Wire the CPU Wiring of AI/AO - Wire the CPU Wiring of Counters - Wire the CPU Best regards, Hristo Mihalev
	Last edited by: UMENCHO at: 2/24/2013 9:32 AM
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2/24/2013 3:01 PM	Rate (0)
ALGUDKAR RAO Posts: 621 Rating: (10)	check backplne connection.
ALGUDKAR RAO Posts: 621 Rating: (10)
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2/25/2013 8:02 PM	Rate (0)
Ton Verra Gold Member Joined: 4/20/2007 Last visit: 12/13/2024 Posts: 728 Rating: (43)	Algudkar check backplne connection. There is no back plane connection for integrated I/O modules.

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