Fig. 170 Linking Of 2-Bit Variable To Additional Task - Beckhoff EL3783 Documentation

Commissioning
• 1: One or more values <= Limit n
• 2: One or more values >= Limit n
• 3: Cases 1 and 2 simultaneously
Linking in the PLC with 2-bit values
The limit information consists of 2 bits. Limitn can be linked to the PLC or a task in the System Man-
ager:
• PLC:
IEC61131-PLC contains no 2-bit data type that can be linked with this process data directly. In
order to transmit the limit information, therefore, define an input byte, e.g.
and link the limit with the VariableSizeMismatch dialog.
• Additional task
2-bit variables can be created in the System Manager.
Fig. 170: Linking of 2-bit variable to additional task
Example of voltage measurement with EL3783:
Channel 1; Limit 1 and Limit 2 enabled, Limit 1 = 100 V, Limit 2 = 200 V, representation: signed integer
Entry in index (Limit 1): 0x8000:13 [} 139]
100 V / (0,0225 V / digit) = 4444
Entry in index (Limit 2): 0x8000:14 [} 139]
200 V / (0,0225 V / digit) = 8889
Output:
130
dec
dec
Version: 1.1 EL3783