Instruction manual

9 - 4

9 REAL MODE/VIRTUAL MODE SWITCHING AND STOP/RE-START

(3) Synchronous encoder axis check

(a) The items in Table 9.3 below are checked to determine the synchronous

encoder state.

If an error is detected, it switches to the virtual mode, but the applicable

system cannot be started. Correct the error cause in the real mode, and

switch to virtual mode again.

(b) When an error is detected, the error detection signal (M2407+20n) of the

applicable output module turns on, and the error code is stored in the

minor/major error code storage register.

Table 9.3 Check Items List for Synchronous Encoder Axis

Applicable synchronous

encoder

Check sequence Check item

External

synchronous

encoder

Output

module

Normal

condition

Abnormal

condition

Not connected

• Is the synchronous encoder connected

to the Q172DEX ?

— Connected

Cable break