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135
Message Communications Characteristics
Section 7-2
The number of message bytes is the number of data bytes following the FINS
command code. The communications cycle time depends on whether remote
I/O communications are being used.
Message Communications Only (Remote I/O Communications Not Used)
Message communications time = 2 (see note) + 0.11 × T
B
+ 0.6 (ms)
T
B
: Baud rate (500 kbps: T
B
= 2; 250 kbps: T
B
= 4; 125 kbps: T
B
= 8)
Note
The communications cycle when remote I/O communications are not being
used is 2 ms.
Message Communications with Remote I/O Communications
Communications cycle time = (Communications cycle time for remote I/O
communications only) + 0.11 × T
B
+ 0.6 (ms)
T
B
: Baud rate (500 kbps: T
B
= 2; 250 kbps: T
B
= 4; 125 kbps: T
B
= 8)
Note
The above equations can be used to find the approximate message communi-
cations time, but not the maximum time. The message communications time
will depend on the frequency of the message communications, the load on the
remote node, the communications cycle time, and other factors. For any one
Master Unit, the message communications time may be greatly increased due
to heavy loads.
Summary of Contents for EJ1 - 07-2008
Page 3: ...iv...
Page 19: ...xx...
Page 33: ...14 Initial Temperature Controller Settings Section 1 4...
Page 53: ...34 Wiring the Temperature Controllers Section 3 4...
Page 101: ...82 Ladder Programming Examples Section 4 6...
Page 143: ...124 Sending Explicit Messages Section 6 5...
Page 155: ...136 Message Communications Characteristics Section 7 2...
Page 163: ...144 Maintenance Section 8 2...
Page 189: ...170 Allocation Numbers for Configurators Manufactured by Other Companies Appendix B...
Page 197: ...178 Index...