Mitsubishi NZ2GFCF-D62PD2 User Manual page 132

In the counter function selection, a delay occurs before the start of the selected function due to any of the following factors:
• Input response time of CH Function input terminal (FUNC1, FUNC2)
• Scan time of the program (for CH Selected counter function start command (RY25, RY3D))
• Link scan time of the network (for CH Selected counter function start command (RY25, RY3D))
• Internal control cycle in the high-speed counter module (ΔT
command (RY25, RY3D))
The count errors by these delays are as follows:
• Count error (maximum) which occurs when a function is performed by CH Function input terminal (FUNC1,
FUNC2)
Function input response time setting (max.) [ms]
• Count error (maximum) which occurs when a function is performed by CH Selected counter function start
command (RY25, RY3D)
(When the master module is the QJ71GF11-T2 with Block Data Assurance per Station set and in the
asynchronous mode)
(SM
For the sampling counter function and the periodic pulse counter function, a sampling/periodic time error due to a
component error (±100ppm) occurs. The count error is as follows:
*1 Pulse input speed [pps] = pulse input frequency [Hz] × number of multiples [count]
*2 Sampling/periodic time [s] = Sampling/periodic time setting value × Sampling/periodic time unit [s]
(When the sampling/periodic time unit setting is 1 [ms], the sampling/periodic time is 0.001 [s]. When the unit setting is
10 [ms], the time is 0.01 [s].)
*3 For ΔT
1
130
*3
1000
n2) [ms] + (LS 2) [ms] +
1000
Sampling/periodic time [s]
and ΔT , refer to Page 283, Appendix 4.
2
2 =
(s) Pulse input speed [pps]
T [ms]
1
(s)
SM: Scan time of the program in the master station
LS: Link scan time
n2: Value obtained from (LS
(The value after the decimal point shall be rounded up.)
100 [ppm]
*2
Pulse input speed [pps]
1000000
0.5ms) (for CH Selected counter function start
*1
*1
Pulse input speed [pps]
SM)
*1