IEC timer error

mehtabahmed

if i put a NC contact after timer or try to add another ladder that connect with first one in a network,it show this error.

please explain this error.

kindly check attachments

Description

The following rules apply to the use of IEC timers and IEC counters on the target system:

The Q output may only be interconnected with a coil.

The CU input may not be connected by a T-branch with another CU input.

Resolution

Correct the interconnection of the IEC timer or the IEC counter.

new question is splittet to what is the difference between IEC timer and SAMATIC timers.