User`s manual

113
CHAPTER 4 FUNCTION
4
4.3 Comparison Output Function 4.3.2 Coincidence output function
● Coincidence output 1 to 8 (X10 to X17) turn on regardless of CH1 Coincidence output enable command (Y02).
● Set the ON time of Reset command (coincidence output 1 to 8) (Y10 to Y17) 2ms or longer using a timer.
● Due to coincidence detection processing inside the QD65PD2, the counter value greater/smaller applicable to Counter
value greater/smaller (coincidence output) (Un\G190) are not updated at the same time when Coincidence output 1 to 8
(X10 to X17) turn on (OFFON).
Therefore, the counter value greater/smaller may be 1 even though it is not the correct value.
● Even if Point setting (coincidence output 1 to 8) (Un\G100 to Un\G115) is changed, the count value is not compared with
the changed value when Setting change request (coincidence output 1 to 8) (Un\G180 to Un\G187) is not set to
Requested (1
H
).
● The initial value of Coincidence output condition setting (Un\G0) is all 0000
H
(all coincidence output) right after the CPU
module is powered on or reset. Also, the initial value of Point setting (coincidence output 1 to 8) (Un\G100 to Un\G115)
and CH1 Present value (Un\G1050 to Un\G1051) are 0. Therefore, Coincidence output 1 to 8 (X10 to X17) turn on.
When CH1 Coincidence output enable command (Y02) is turned on, signals are output as if coincidence output was
detected.
In order to prevent the condition above, take one of the following measures described in Point in Page 111, Section 4.3.2
(5) before turning on CH1 Coincidence output enable command (Y02).
8)
When CH1 Present value (Un\G1050, Un\G1051) > Point setting (coincidence output 1) (Un\G100, Un\G101) is made, Counter
value greater (coincidence output 1) (Un\G190.b1) becomes 1.
9)
Turn on Reset command (coincidence output 1) (Y10) to reset Coincidence output 1 (X10) and the coincidence output 1
terminal (EQU1). If these are not reset, the next coincidence output 1 cannot be detected.
Number Description