Mitsubishi Electric Q173DSCPU Programming Manual page 111

5 INPUT AXIS MODULE
Q173DSCPU Input module
(2) Via device (Synchronous encoder value input of via device)
(a) Setting method
Used to operate a gray code encoder that is connected to the input module
of the Motion CPU control as a synchronous encoder axis.
By setting "201: Via device" in [Pr.320] Synchronous encoder axis type, the
synchronous encoder is controlled by the encoder value which is the input
value of [Cd.325] Input value for synchronous encoder via device
(D14826+10n, D14827+10n).
The encoder value can be used as a cycle counter within the range from 0
to (Resolution of synchronous encoder via device - 1).
Connection is invalid just after the system's power supply is ON. When "1" is
set in [Rq.324] Connection command of synchronous encoder via device
(M11602+4n), the synchronous encoder axis current value and the
synchronous encoder axis current value per cycle are restored based on
[Cd.325] Input value for synchronous encoder via device (D14826+10n,
D14827+10n). Therefore, connection becomes valid, and will be on the
counter enabling status.
The synchronous encoder axis is controlled based on the amount of change
of [Cd.325] Input value for synchronous encoder via device (D14826+10n,
D14827+10n) while it is connecting.
(b) Setting example
The following shows an example for setting a synchronous encoder via
device as synchronous encoder axis 4.
Axis 1
Set the following in [Pr.320]Synchronous encoder axis type and [Pr.329]
Resolution of synchronous encoder via device of synchronous encoder axis
4 on the synchronous encoder axis parameter screen of MT Developer2.
• Type..........................................................................."201: Via device"
• Resolution of synchronous encoder via device. ......."4096"
Read the encoder value of the gray code encoder with a sequence program,
and update [Cd.325] Input value for synchronous encoder via device
(D14826+10n, D14827+10n) of the synchronous encoder axis 4 at every
time.
Axis 2
5 - 32
Gray code
encoder
(Resolution 4096)
Synchronous encoder
axis 4
Axis 3