Entry type: Product note Entry ID: 4126501, Entry date: 08/27/1996
S5-115U with CPU 944 and ET 200 - Product Information
Concerns products with the Catalog Nos.: 6ES5 944-7UA12 CPU 944 for S5-115 with 1 serial port 6ES5 944-7UA22 CPU 944 for S5-115 with 2 serial ports 6ES5 944-7UB11 CPU 944B for S5-115 96Kbyte with 1 serial port 6ES5 944-7UA21 CPU 944B for S5-115 96Kbyte with 2 serial ports 6ES5 308-3UB11 IM 308 master interface module for ET 200 6ES5 308-3UC11 IM 308-C master interface module for ET 200 During the processing of analog values in the ET 200 system via the integrated function blocks of the CPU 944, the IM 308 will detect any inconsistency of data. In the case of the integrated FBs 250/251 the CPU 944 has a dif- ferent reading and writing access mode than the CPUs 941/942/943 and 945. The IM 308B/C cannot detect this, resulting in a wrong sequence of access to the consistent area. The data exchange on the SINEC L2-DP bus is aborted and the out- puts of the slave stations are reset. In view of this, the use of the integrated FB 250/251 is no longer permitted for ET 200. Reading and outputting of analog values must be done by means of L PW and T PW operations. -------------------------------
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