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):

SwapLimitBits setting	Value
TRUE (default setting)	0: not active 1: value > limit value 2: value < limit value 3: Value is equal to the limit value
FALSE	0: not active 1: value < limit value 2: value > limit value 3: Value is equal to the limit value

	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.

Limit evaluation, index 80n0:07/08 2: — Input byte definition

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

Limit evaluation, index 80n0:07/08 3: — 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%)

Input channel 1	Index 0x6000:03	Index 0x6000:05
4500	0x02_hex, (Limit 1, limit value undershot)	0x02_hex, (Limit 2, limit value undershot)
5000	0x03_hex, (Limit 1, limit value reached)	0x02_hex, (Limit 2, limit value undershot)