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hsc help

Created by: aaeretyed at: 8/28/2017 7:45 PM (4 Replies)

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8/28/2017 7:45 PM	Rate (0)
aaeretyed Posts: 6 Rating: (0)	hi everybody! i have cpu 1214 dc dc dc v4.0 and have a servo motor, i don't know how to connect from driver servo to PLC to use HSC. you know, driver servo have 4 pin, they are: CHA+, CHA-, CHB+, CHB-. i use HSC1 in my PLC, so I0.0 is CHA phase, and I0.1 is CHB phase. Then i connect CHA+ with I0.0, CHB+ with I0.1, CHA- and CHB- with 0VDC from 24VDC power. But i can't read any hsc value. so i think i don't know how to connect plc and driver to use HSC. do you help me? it will be helpful for me. hsc
aaeretyed Posts: 6 Rating: (0)
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8/29/2017 6:14 PM	Rate (0)
TheBitsSolutions Regular Member Joined: 1/30/2013 Last visit: 11/19/2020 Posts: 4 Rating: (0)	Can you be more specific about the encoder used? There are many types of encoders that fits your description -> HTL, TTL, RS422 etc..but judging from the signals it may be an RS422 encoder, which is usually 5VDC. The S7-1200 requires a minimum of 15VDC to trigger on (Logic 1 Level = 15 to 26 VDC).

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8/30/2017 2:42 AM	Rate (0)
grrrrrroooo Platinum Member Joined: 3/16/2015 Last visit: 10/10/2021 Posts: 1250 Rating: (173)	aaeretyed hi everybody! i have cpu 1214 dc dc dc v4.0 and have a servo motor, i don't know how to connect from driver servo to PLC to use HSC. you know, driver servo have 4 pin, they are: CHA+, CHA-, CHB+, CHB-. i use HSC1 in my PLC, so I0.0 is CHA phase, and I0.1 is CHB phase. Then i connect CHA+ with I0.0, CHB+ with I0.1, CHA- and CHB- with 0VDC from 24VDC power. But i can't read any hsc value. so i think i don't know how to connect plc and driver to use HSC. do you help me? it will be helpful for me. hsc Hi aseretyed, TheBitsSolutions questions are valid, please provide more infromation. But I would suggest connecting CHA+ and CHB+ to your I0.0 and I0.1 on the PLC as HSC inputs. Do not connect CHA- and CHB- at all as I believe they're also encoder outputs. The question now is where's the encoder getting power from, are there more wires to be connected or is it getting power from the drive? Kal

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8/30/2017 11:45 AM	Rate (0)
Denilson Pegaia Platinum Member Joined: 9/23/2005 Last visit: 11/11/2024 Posts: 4351 Rating: (1452)	Hi, first check if the A+ A- B+ B- are input or outputs (normaly servor motors became signals from controller). Check also if A+ B+ A- B- are 24V (many times + /- signals are related to 5VDC). if both checks match, use just A+ and B+. Be sure that both devices are interconected by the M power supply voltage.
	Denilson Pegaia Siemens Industry Sector Technical Support
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This contribution was helpful to 1 thankful Users grrrrrroooo

11/27/2017 6:49 AM	Rate (0)
Jen_Moderator Diamond Member Joined: 6/19/2017 Last visit: 9/6/2024 Posts: 8175 Rating: (172)	New question published by mans_electro is split to a separate thread with the subject Run-Time Programming Problems of HSC counter in S7 224xp. Best regards Jen_Moderator

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