7-79
Calculation example 3
When all but one station have been added to a 16-unit link, the largest station number is 16, relays and
registers have been allocated evenly, and the scan time for each PLC is 5 ms.
Ttx = 0.096 Each Ts = 5 + 6.82 = 11.82 ms
Tlt = 0.096 x (13 + 2 x 15)
≒
4.13 ms
Tlk = 0.96 + 400 + 0.67 + 5
≒
407 ms
Note: The default value for the addition waiting time is 400 ms.
Given the above conditions, the maximum value for the transmission time (T) of one cycle will be:
T max. = 11.82 x 15 + 4.13 + 5 + 407 = 593.43 ms
Calculation example 4
When all stations have been added to an 8-unit link, the largest station number is 8, relays and register
have been evenly allocated, and the scan time for each PLC is 5 ms.
Ttx = 0.096 Each Pcm = 23 + (8 + 16) x 4 = 119 bytes
Tpc = Ttx x Pcm = 0.096 x 119
≒
11.43 ms
Each Ts = 5 + 11.43 = 16.43 ms Tlt = 0.096 x (13 + 2 x 8)
≒
2.79 ms
Given the above conditions, the maximum value for the transmission time (T) of one cycle will be:
T max. = 16.43 x 8 + 2.79 + 5 = 139.23 ms
Calculation example 5
When all stations have been added to a 2-unit link, the largest station number is 2, relays and registers
have been evenly allocated, and the scan time for each PLC is 5 ms.
Ttx = 0.096 Each Pcm = 23 + (32 + 64) x 4 = 407 bytes
Tpc = Ttx x Pcm = 0.096 x 407
≒
39.072 ms
Each Ts = 5 + 39.072 = 44.072 ms Tlt = 0.096 x (13 + 2 x 2)
≒
1.632 ms
Given the above conditions, the maximum value for the transmission time (T) of one cycle will be:
T max. = 44.072 x 2 + 1.632 + 5 = 94.776 ms
Calculation example 6
When all stations have been added to a 2-unit link, the largest station number is 2, 32 relays and 2
register words have been evenly allocated, and the scan time for each PLC is 1 ms.
Ttx = 0.096 Each Pcm = 23 + (1 + 1) x 4 = 31 bytes
Tpc = Ttx x Pcm = 0.096 x 31
≒
2.976 ms
Each Ts = 1 + 2.976 = 3.976 ms Tlt = 0.096 x (13 + 2 x 2)
≒
1.632 ms
Given the above conditions, the maximum value for the transmission time (T) of one cycle will be:
T max. = 3.976 x 2 + 1.632 + 1 = 10.584 ms
Note:
•
In the description, “stations that have been added” refers to stations which are connected between
station no. 1 and the largest station number and for which the power supply has been turned on.
•
Comparing examples 2 and 3, the transmission cycle time is longer if there is one station that has not
been added to the link. As a result the PC(PLC) link response time is longer.
•
The SYS1 instruction can be used to minimize thte transmission cycle time even if there are one or
more stations that have not been added to the link.
Summary of Contents for FP E Series
Page 1: ......
Page 16: ......
Page 17: ...Chapter 1 Functions and Restrictions of the Unit ...
Page 28: ...1 12 ...
Page 29: ...Chapter 2 Specifications and Functions of the Unit ...
Page 37: ...2 9 Circuit diagram C32 Y0 Y1 Y3 Y4 C28 Y0 Y1 Y3 Y4 Y2 Y5 to YF Y2 Y5 to YB ...
Page 48: ...2 20 ...
Page 49: ...Chapter 3 Expansion ...
Page 56: ...3 8 Terminal layout diagram Note The numbers in the connector are for the first expansion ...
Page 61: ...Chapter 4 I O Allocation ...
Page 66: ...4 6 ...
Page 67: ...Chapter 5 Installation and Wiring ...
Page 90: ...5 24 ...
Page 91: ...Chapter 6 High speed counter Pulse Output and PWM Output functions ...
Page 116: ...6 26 ...
Page 121: ...6 31 ...
Page 125: ...6 35 Pulse output diagram ...
Page 131: ...6 41 ...
Page 139: ...6 49 ...
Page 141: ...6 51 ...
Page 144: ...6 54 Program Continued on the next page ...
Page 145: ...6 55 ...
Page 147: ...6 57 Program ...
Page 151: ...Chapter 7 Communication Cassette ...
Page 210: ...7 60 The values of DT50 and DT51 are written in DT0 and 1 of PLC ...
Page 238: ...7 88 ...
Page 239: ...Chapter 8 Self Diagnostic and Troubleshooting ...
Page 247: ......
Page 248: ......
Page 249: ...Chapter 9 Precautions During Programming ...
Page 260: ...9 12 Example 2 Using the CT instruction between JP and LBL instructions ...
Page 268: ...9 20 ...
Page 269: ...Chapter10 Specifications ...
Page 286: ......
Page 287: ...Chapter 11 Dimensions ...
Page 290: ...11 4 11 1 3 Expansion Unit FPG XY64D2T FPG XY64D2P FPG EM1 ...
Page 293: ...Chapter 12 Appendix ...
Page 297: ...12 5 ...
Page 437: ...12 145 12 7 ASCII Codes ...
Page 439: ......
Page 440: ......