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10/1/2010 4:22 AM | |
Joined: 9/21/2006 Last visit: 5/25/2023 Posts: 247 Rating: (65) |
John: Is the version of the Simocode block you are using calling SFC58 (WR_REC) or SFC59 (RD_REC)? There are some resource limitations on simultaneous calls to these and similar blocks. http://support.automation.siemens.com/WW/view/en/15364459. The limit for WinAC RTX is 20, which is normally more than enough. However, I have seen cases where, when new program versions are downloaded to the PLC, SFC 58/59 resources that were in use when the new block were downloaded are never released, so are "leaked" out of the system. Power cycling the PLC resets the resources, so they are all available again. This might explain the behavior you are seeing. Regards, Murray McKay |
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