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Mitsubishi Electric Melsec Q Series User Manual page 107

Profibus-dp master module
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3
SPECIFICATIONS
Item
The time taken until the redundant CPU in system A receives a system switching request from the
QJ71PB92V in system A and then sends a system switching request to the other redundant CPU in
TcpuA [ms]
system B.
TcpuA [ms] = Scan time + 3
System switching time of redundant CPU
Tsw [ms] =
•
[ms] = System switching processing time (
CPU module used)
Tsw [ms]
• T m [ms] = Automatic refresh time of QJ71PB92V (
program fundamentals) for the CPU module used)
• Trc [ms] = Tracking data loading time by standby system CPU (
redundant system for the CPU module used)
Internal processing time of the QJ71PB92V
Tp [ms] = (Total number of bytes for I/O data lengths of all DP-Slaves
Tp [ms]
Transmission Speed 1
*2
Speed 2
Scan time of the redundant CPU (
Scan [ms]
for the CPU module used)
Number of switching target DP-Slaves that are specified in the system switching DP-Slave
Nand
specification area (Un\G23649 to Un\G23656) when AND is set in the System switching condition
area (Un\G23648)
Transmission speed
9.6kbps
19.2kbps
93.75kbps
187.5kbps
500kbps
1.5Mbps
3Mbps
6Mbps
12Mbps
Table3.30 Items in TIcs and TIsc Calculation Formulas
+ T m + Trc
*2
) + (No. of connected DP-Slaves
) + Common processing time
* 1 The I/O data length of each DP-Slave can be confirmed on the Slave Modules window of GX
Configurator-DP. (
GX Configurator-DP Version7 Operating Manual)
* 2 The time differs as shown below depending on the transmission speed.
Table3.31 Time Corresponding to Transmission Speed
Time Corresponding to
Transmission Speed 1
0.9[ms]
0.6[ms]
0.18[ms]
0.09[ms]
0.035[ms]
0.01[ms]
0.007[ms]
0.0025[ms]
0.002[ms]
3.5 Processing Time
3.5.3 System switching time in redundant system
Description
User's manual for the redundant system for the
User's manual (function explanation,
Time Corresponding to Transmission
*2
User's manual (function explanation, program fundamentals)
Time Corresponding to
Transmission Speed 2
1.8[ms]
1.4[ms]
1.0[ms]
1.0[ms]
1.0[ms]
1.0[ms]
0.9[ms]
0.8[ms]
0.8[ms]
User's manual for the
*1
Time Corresponding to
Common Processing time
500[ms]
250[ms]
60[ms]
50[ms]
40[ms]
35[ms]
35[ms]
35[ms]
30[ms]
3
1
2
3
4
5
6
7
8
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