Mitsubishi Electric MELSEC iQ-R Series User Manual page 42

When "1_ _ _H" is set in the servo parameter "Scale measurement function selection (PA22)" and the
synchronous encoder movement amount (encoder pulse units) on disconnection or during the power supply
OFF exceeds "2147483647" or "-2147483648", the synchronous encoder axis position value is restored with
its opposite sign.
■Point of the setting method
• If the servo amplifier set by the servo parameter "Scale measurement function selection (PA22)" does not support the
"Scale measurement mode", "AL.37" (parameter error) will occur in the servo amplifier. Refer to the servo amplifier
instruction manual and manual for details of the servo parameter "Scale measurement function selection (PA22)".
[RD77MS]
• "Scale measurement function selection (PA22)" is set to the servo amplifier set by "ABS" or "INC" from the "External
synchronous encoder input" list of the amplifier setting dialog using the Simple Motion Module Setting Function.
• When the servo parameter "Scale measurement function selection (PA22)" is changed, it is required to switch the power of
servo amplifier off once after the parameter is transferred to the servo amplifier, and then switch it on again.
• The synchronous encoder via servo amplifier can be controlled up to 4. However, there is no restriction for the number of
connections. Therefore, the error check is not executed even when the external synchronous encoders are set more than 4
in the "System Setting" using the Simple Motion Module Setting Function.
• The following information of the synchronous encoder via servo amplifier can be output with the optional data monitor. The
setting details of the optional data monitor for the synchronous encoder information are shown below.
Information of synchronous encoder
Scale position within one-revolution
Scale absolute counter
• When the scale measurement mode is used in the MR-J5(W)-B, even if the encoder resolution is 67108864 [pulse/rev], the
synchronous encoder movement amount is converted to 4194304 [pulse/rev] by the internal processing of the Simple
Motion module. For "[Pr.322] Synchronous encoder axis unit conversion: Numerator" and "[Pr.323] Synchronous encoder
axis unit conversion: Denominator", set the encoder resolution as 4194304 [pulse/rev].
• In the MR-J5(W)-B, set the servo parameter "Scale measurement function selection (PA22)" with the servo parameter
PA22.3. For the setting details of PA22.3, refer to MRJ5(W)-B manuals.
[RD77GF]
• The following information of the synchronous encoder via servo amplifier can be output with servo cyclic transmission
function and servo transient transmission function. For the detail of objects to be set, refer to the manual of the slave
device.
Information of synchronous encoder
Load side encoder information 1
Load side encoder information 2
A serial absolute synchronous encoder Q171ENC-W8 can be used in an incremental system by setting "2_ _ _H" in the servo
parameter "Scale measurement function selection (PA22)" even if the battery of the servo amplifier is dismounted.
2 INPUT AXIS MODULE
40
2.2 Synchronous Encoder Axis
Setting detail for optional data monitor
24: Load side encoder information 1 (Used point: 2words)
25: Load side encoder information 2 (Used point: 2words)