Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 66

Via device (Synchronous encoder value input of via device)
■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 (R: D42326+16n,
D42327+16n/Q: 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 the "[Rq.324] Connection command of synchronous
encoder via device/master CPU (R: M42242+8n/Q: M11602+4n)" turns ON, 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 (R: D42326+16n, D42327+16n/Q: 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 (R: D42326+16n, D42327+16n/Q: D14826+10n, D14827+10n)" while it is connecting.
■Setting example
The following shows an example for setting a synchronous encoder via device as synchronous encoder axis 4.
R32MTCPU Input module
Set the following in Synchronous encoder axis setting Resolution of synchronous encoder via device of synchronous encoder
axis 4 on the synchronous encoder axis parameter screen of MT Developer2.
Setting item
[Pr.320] Synchronous encoder axis type
[Pr.329] Resolution of synchronous encoder via device
4 INPUT AXIS MODULE
64
4.3 Synchronous Encoder Axis
Axis 1 Axis 2
Setting value
201: Via Device
4096
Gray code
encoder
(Resolution 4096)
Synchronous encoder
axis 4
Axis 3