User`s manual

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2 SYSTEM CONFIGURATION
(3) Select to number of the synchronous encoder modules
Synchronous encoders are available in voltage output type(incremental),
differential output type(incremental) and serial absolute output type(Q170ENC).
Q172DEX can be connected to only serial absolute output type(Q170ENC).
When using the incremental synchronous encoder of voltage output type or
differential output type, must be used Q173DPX. (The synchronous encoders are
used only in the SV22 virtual mode.)
In addition, the usable numbers of synchronous encoders differ depending on the
modules.
The following number of serial absolute synchronous encoders and incremental
synchronous encoders combined can be used.
Motion CPU module Synchronous encoder
Q173DCPU Up to 12 modules ( Q172DEX: Up to 6 modules )
Q172DCPU Up to 8 modules ( Q172DEX: Up to 4 modules )
• Tracking enable signal
Tracking enable signal of Q172DEX is used as a high-speed reading
function. It cannot be used, as the input start signal which start the input
form serial absolute synchronous encoders.
When using the inputs start signal which start the input from synchronous
encoder, must be used Q173DPX. (Type of synchronous encoder is
voltage output(incremental)or differential output(incremental). )
The external input signal of the synchronous encoder is indicated below.
External input signal of the
synchronous encoder
Item
Number of points on
one Q172DEX
Tracking enable signal input High-speed reading function 2 points