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9-2
9.1 Finding the Cause of an Error and Correcting the Error
This chapter explains the method for troubleshooting and checking error states when using the remote
I/O system [MEWNET-F].
9.1.1 Finding the Cause of an Error
Follow the procedure below to find the cause of an error and eliminate it.
1. Checking the LEDs
Check the "ALARM" and "COMM." (or COM.) LEDs on the master unit, slave unit and FP I/O terminal.
LED name
Status
Contents
Actions
ALARM
Lights:
Error in the unit or board.
Replace the unit/board with a
new one.
Flashing
slowly
(1-s cycle)
A communication error (such as
the disconnection of transmission
cable or the power off of slave
station) occurs on another station.
Check the transmission line
and location, and take a proper
step.
COMM.
(COM.)
Goes out:
Transmission error (Error in
transmission cables or the
terminal station setting,
communication with a master unit
cannot be performed.)
Check the error and take a
proper step.
2. Determining what kind of error has occurred
When an error occurs, the self-diagnostic function will be activated and the type or source of the error
will be able to be checked.
They will be stored in teh special data registers DT9136(DT90136) and DT9137(DT90137).
3. Checking the communication path (for master 1 through master 4) on which an error has
occurred
You can check which communication path has produced an error with the special data registers
DT9136(DT90136) and DT9137(DT90137), and with the special internal relays R9058 to R905B.
4. Checking the slave station number of the slave station where an error occurs
You can check the slave station number in error with the special data registers DT9131(DT90131) and
DT9135(DT90135).
Содержание MEWNET-F
Страница 9: ...Chapter 1 Functions and Restrictions of the Unit ...
Страница 19: ...Chapter 2 Part Names and Functions ...
Страница 40: ...2 22 ...
Страница 41: ...Chapter 3 Unit Specifications ...
Страница 52: ...3 12 ...
Страница 53: ...Chapter 4 Installation and Wiring ...
Страница 62: ...4 10 ...
Страница 63: ...Chapter 5 Connection for the Remote I O System ...
Страница 75: ...Chapter 6 Remote I O Map ...
Страница 84: ...6 10 ...
Страница 85: ...Chapter 7 Operation Modes for Controlling MEWNET F ...
Страница 97: ...Chapter 8 Control by MEWNET F ...
Страница 108: ...8 12 Flowchart ...
Страница 110: ...8 14 ...
Страница 111: ...Chapter 9 Troubleshooting ...
Страница 120: ...9 10 ...
Страница 121: ...9 11 9 5 2 When the ALARM LED is ON ...
Страница 122: ...9 12 9 5 3 When the Communication LED on the Master Unit does Not Flash Normally ...
Страница 123: ...9 13 When the COMM LED is OFF ...
Страница 124: ...9 14 When the COMM LED is ON ...
Страница 125: ...9 15 9 5 4 When the Communication LED on a Slave Station does Not Flash Normally ...
Страница 126: ...9 16 When the COMM LED is OFF ...
Страница 127: ...9 17 When the COMM LED is ON ...
Страница 128: ...9 18 9 5 5 When the CPU does Not Operate ...
Страница 129: ...9 19 9 5 6 When the Input Output Function of a Slave Station does Not Work ...
Страница 130: ...9 20 9 5 7 When the Memory Access Function for the Advanced Unit s Memory does Not Work ...
Страница 134: ...9 24 ...
Страница 135: ...Chapter 10 Dimensions ...
Страница 136: ...10 2 10 1 FP2 Multi wire Link Unit AFP2720 10 2 FP3 Remote I O Master Unit AFP3742 ...
Страница 137: ...10 3 10 3 FP2 Remote I OSlave Unit AFP2745 10 4 FP3 Remote I OSlave Unit AFP3745 ...
Страница 141: ...10 7 10 8 FP0 I O Link Unit AFP0732 ...
Страница 142: ...10 8 ...
Страница 143: ...Chapter 11 Appendix 1 I O Link With FP1 ...
Страница 147: ...11 5 11 3 Part Names and Functions ...
Страница 159: ...Chapter 12 Appendix 2 I O Link With FP0 ...
Страница 164: ...12 6 ...
Страница 165: ...Record of changes Manual No Date Desceiption of changes FAF 35E 1 Mar 2008 First edition ACG M0028 1 FAF 35 13 ...
Страница 166: ......
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Страница 168: ...FAF 35E 1 200803 http www mew co jp ac e fasys 2008 ...