Summary When zenon variable has ALT_VAL status bit (bit 27) the Process Gateway iec870Slave sends value changes in ASDU with quality descriptor flag IV ('invalid') or NT ('not topical'). It should send, in quality descriptor in ASDU, the flag SB - ...
Data quality is very important to the integrity of a HMI or SCADA system. As such, zenon has numerous ways to monitor the communication status of different devices within your automation environment. Here are some options that you can use in your ...
Summary When performing an online change on downloading a new zenon logic project to the zenon logic runtime, variables from the STRATONNG driver become INVALID. Variables from the STRATON32 driver remain spontaneous DescriptionWhen performing an ...
Small red squares on the dynamic elements in zenon Service Engine indicate that the INVALID Bit (aka I-Bit) is active for the linked variable. The INVALID Bit is set true automatically by the zenon drivers for variables when there is an underlying ...
Summary In specific project configuration/offset constellation invalid Bit is set when a FLOAT variable is seen in a screen even if all offset configuration is correct. The problem occurs when in the driver configuration it is enabled the "Offset ...