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7/11/2011 9:41 AM | |
Joined: 10/7/2005 Last visit: 10/19/2024 Posts: 3024 Rating: (1054)
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Hello ashishmishra SI1 is the AS511 PG interface and SI2 is the optional second port. A red LED on them means that they have an internal error(which explains why you can't go online). Thingsyou can try are: 1.) Power the rack off, wait for 30 seconds or so and power on again 2.) If the above does NOT help: Power the rack off, remove CPU(Warning: you will loose your programunless you have an EPROM), wait for 30 seconds or so, plug CPU back in andpower on again 3.) If the above does NOT help: Try a new CPU. 4.) If the above does NOT help: Trya new Power supply I hope this helps and below are the relevant manuals for your info: S5-135U CPU 928B Programming Guide SIMATIC S5-135U/155U System Manual |
Cheers |
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