Omron CJ1W-DRM21 - Page 222

8 Communications Timing
8-4
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
z Input Slaves with Less Than 8 Bytes of Input
T
RT
= 0.016 ×T
B
× S
IN1
+ 0.06 × T
B
+ 0.05 [ms]
S
IN1
: The number of Input Slave input words
T
B
: The baud rate factor
(500 kbit/s: T
B
= 2; 250 kbit/s: T
B
= 4; 125 kbit/s: T
B
= 8)
z Mixed I/O Slaves with Less Than 8 Bytes of Input or Output
T
RT
= 0.016 × T
B
× (S
OUT2
+ S
IN2
) + 0.11 × T
B
+ 0.07 [ms]
S
OUT2
: The number of Mixed I/O Slave output words
S
IN2
: The number of Mixed I/O Slave input words
T
B
: The baud rate factor
(500 kbit/s: T
B
= 2; 250 kbit/s: T
B
= 4; 125 kbit/s: T
B
= 8)
z Slaves with More Than 8 Bytes of Input or Out put
T
RT
= T
OH
+ T
BYTE-IN
× B
IN
+ T
BYTE-OUT
× B
OUT
[ms]
T
OH
: Protocol overhead
T
BYTE-IN
: The input byte transmission time
B
IN
: The number of input words
T
BYTE-OUT :
The output byte transmission time
B
OUT :
The number of output words
For Input Slaves take B
OUT
to be 0, and for Output Slaves take B
IN
to be 0.
Baud rate
T
OH
T
BYTE-IN
T
BYTE-OUT
500 kbit/s 0.306 ms 0.040 ms 0.036 ms
250 kbit/s 0.542 ms 0.073 ms 0.069 ms
125 kbit/s 1.014 ms 0.139 ms 0.135 ms