Wiring Section 2-2
46
2-2-3-5 Encoder output
Encoder edges
The CJ1W-MCH72 can generate encoder-type pulses. For each internal count
(C), the CJ1W-MCH72 produces one encoder edge for phase A (A) or phase
B (B).
2-2-4 Absolute encoder
2-2-4-1 SSI
SSI (Synchronous Serial Interface) is a digital system for transferring data in
serial form. SSI is the most widely used serial interface between absolute
sensors and controllers. SSI uses a pulse train from the controller to clock out
the data from the sensor. The SSI interface of the CJ1W-MCH72 accepts
absolute values from an encoder if the data is in Gray Code format or in binary
format and if the resolution is 25 bits or less. The number of bits, and therefore
the number of clock pulses sent to the encoder in each frame, is
programmable. You set this number with the BASIC command
ENCODER_BITS = n.
When you have initialized the CJ1W-MCH72 with the ENCODER_BITS
command, the CJ1W-MCH72 continuously sends clock pulses to the encoder.
These clock pulses are sent in frames of n+2 pulses, where n is the bit count
set. The clock rate is fixed at 200 kHz. The clock interval between frames is 32
µs. The resulting maximum cable length between the controller and the sensor
is 200 m.
Z+ Orange 7 Z+
Z- Orange/red 8 Z-
0 V (COM) Blue 9 0 V Encoder ground
5 VDC Brown 6 5 V
E6B2-CWZ1Z encoder CJ1W-MCH72 encoder interface
Signal Wire color Pin Signal
01234567
A
B
C
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