Synchronous Encoder; Operation Description - Mitsubishi Electric Q Series Programming Manual

6 DRIVE MODULE

6.2 Synchronous Encoder

6.2.1 Operation description

The synchronous encoder is used to operate the virtual axis (virtual main shaft, virtual
auxiliary input axis) with the external input pulse.
Synchronous encoder operation and parameters are shown below.
(1) Operations
Although a synchronous encoder does not need to start using the servo program
etc. in order to operate it by external devices, it needs cautions for the timing
which begins to input the input pulse from a synchronous encoder.
(a) Operation start
The input timing of input pulse
is shown below.
At the switching from real mode to virtual mode
•
At the external signal
•
signal) input
1) When the input pulse is started to input at the switching from real mode
to virtual mode.
a) The input pulse is input from the external synchronous encoder at the
switching from real mode to virtual mode.
Real mode/virtual mode
switching request flag (M2043)
Real mode/virtual mode
switching status flag (M2044)
Input pulse from the external
synchronous encoder
Feed current value of the
synchronous encoder axis
b) The control mode (Note-3) of a clutch is operation in the case of
ON/OFF mode and address mode. It can be used with the
synchronous encoder for the incremental/absolute data method.
c) Operating of the synchronous encoder axis starts when switched to
the virtual mode by executing the switching request from real mode to
virtual mode (M2043 OFF to ON). It depends on the state of
connected clutch whether synchronous encoder operation in virtual
mode is transmitted or not to the output module.
• Clutch ON ........ Transmit to the output module.
• Clutch OFF ...... Not transmit to the output module.
(Note-4)
from an external synchronous encoder
(Note-2)
(TREN : Synchronous encoder input start
(Note-4)
ON
(Note-1)
OFF
ON
(Note-1)
OFF
Real mode
Operation start of the synchronous encoder axis
6 - 14
Virtual mode
(2 -1)
31
(-2 )
31