Limit evaluation, index 80n0:07/08

If the value exceeds or falls below these values, which can be entered in the indices 0x80n0:13 and 0x80n0:14, then the bits in the indices 0x60n0:03 and 0x60n0:05 are set accordingly. The indices 0x80n0:07 or 0x80n0:08 serve to activate the limit value monitoring. The limit function can be inverted by SwapLimitBits in index 0x80n0:0E.

Output Limit n (2-bit):

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 Manager.

• PLC:
  IEC61131-PLC contains no 2-bit data type that can be linked with this process data directly. For transferring the limit information, define an input byte (e.g. see Fig. Input byte definition) and link the limit to the VariableSizeMismatch dialog, as described in section Note about the 1-byte status of earlier EtherCAT Terminals.

Fig.146: Input byte definition

• Additional task
  2-bit variables can be created in the System Manager.

Fig.147: Linking of 2-bit variable to additional task

Channel 1; Limit 1 and Limit 2 enabled, Limit 1 = 5000 (corresponding to ~15% control), Limit 2 = 15000 (corresponding to ~45%)