Installation and Wiring
FP2/FP2SH
4
−
37
4.6
Safety Measures
4.6.2
Momentary Power Failures
If the duration of the power failure is less than 10 ms, the FP2/FP2SH continues to oper-
ate. If the power is off for 10 ms or longer, operation changes depending on the
combination of units, the power supply voltage, and other factors. (In some cases, op-
eration may be the same as that for a power supply reset.)
4.6.3
Alarm Output
The alarm output goes on when the watchdog timer is activated by a program error or
an error in the hardware itself.
The alarm output terminal has two relay contacts, N.O. (normally open) and N.C. (nor-
mally closed). This can be used as an external alarm signal when an error occurs.
Lamp for alarm
signal
L
Power supply unit
NC
COM
NO
Watchdog timer
The watchdog timer is a program error and hardware error detection timer. It goes on
when the scan time exceeds 640 ms.
When the watchdog timer is activated, at the same time the ALARM LED lights, the
ALARM contacts on the power supply unit go on, all outputs to the output units are
turned off and the unit is put in halted state. The system is in a non-processing state that
includes communications with programming tools as well.
Note
The ALARM contacts of the power supply unit installed on the
expansion backplane will not also operate.
Содержание fp2/fp2sh
Страница 1: ......
Страница 19: ...Chapter 1 Overview ...
Страница 20: ...FP2 FP2SH Overview 1 2 ...
Страница 41: ...Chapter 2 Parts and Functions ...
Страница 42: ...FP2 FP2SH Parts and Functions 2 2 ...
Страница 76: ...FP2 FP2SH Parts and Functions 2 36 2 9 Input Units Specifications Pin Layout Input X0 to X1F 24V DC I II ...
Страница 109: ...Chapter 3 I O Allocation ...
Страница 110: ...FP2 FP2SH I O Allocation 3 2 ...
Страница 130: ...FP2 FP2SH I O Allocation 3 22 3 6 I O Numbers of Free Slots ...
Страница 131: ...Chapter 4 Installation and Wiring ...
Страница 132: ...FP2 FP2SH Installation and Wiring 4 2 ...
Страница 168: ...FP2 FP2SH Installation and Wiring 4 38 4 6 Safety Measures ...
Страница 169: ...Chapter 5 Procedure Until Operation ...
Страница 170: ...FP2 FP2SH Procedure Until Operation 5 2 ...
Страница 176: ...FP2 FP2SH Procedure Until Operation 5 8 5 2 Programming with Programming Tool Software ...
Страница 177: ...Chapter 6 FP2 FP2SH Operation ...
Страница 178: ...FP2 FP2SH FP2 FP2SH Operation 6 2 ...
Страница 210: ...FP2 FP2SH FP2 FP2SH Operation 6 34 6 8 FP2SH IC Memory Card Operation for FP2 C2P FP2 C3P ...
Страница 211: ...Chapter 7 IC Memory Card ...
Страница 212: ...FP2 FP2SH IC Memory Card 7 2 ...
Страница 237: ...Chapter 8 Self Diagnostic Function and Troubleshoot ing ...
Страница 238: ...FP2 FP2SH Self Diagnostic Function and Troubleshooting 8 2 ...
Страница 247: ...Chapter 9 Maintenance ...
Страница 248: ...FP2 FP2SH Maintenance 9 2 ...
Страница 255: ...Chapter 10 Specifications ...
Страница 256: ...FP2 FP2SH Specifications 10 2 ...
Страница 268: ...FP2 FP2SH Specifications 10 14 10 3 Cable Adapter Specifications ...
Страница 269: ...Chapter 11 Appendix ...
Страница 285: ...11 17 Example 2 When system register 4 sets 1 new Time chart 1 Time chart 2 ...
Страница 365: ...11 97 11 7 ASCII Codes ...
Страница 366: ...11 98 ...
Страница 372: ...Record of changes FP2 FP2SH R 2 ...
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