Mitsubishi Electric MELCEC Q Series User Manual page 239

APPENDICES
Number Name
D9196
D9197
Faulty station
detection
D9198
D9199
Table App.2.2 Special Register List (continued)
Description
• Bit which corresponds to faulty I/O module or remote
terminal module is set (1).
(Bit which corresponds to a faulty station is set when
normal communication cannot be restored after
executing the number of retries set at D9174.)
• If automatic online return is enabled, bit which
corresponds to a faulty station is reset (0) when the
Bit pattern of the
station is restored to normal.
faulty station
• Data configuration
Address
Station
D9196
Station
D9197
Station
D9198
Station
D9199
POINTS
(1) The contents of special registers are all cleared when power supply is turned
off regardless of latch clear operation or reset operation using the reset key
switch. The contents are retained when the RUN/STOP key switch is set to
STOP position.
(2) The contents of special registers marked *1 are not cleared even if normal
status is recovered. Use any of the following methods to clear the data.
(a) Method by user program
Insert the circuit shown at right into
the program, and turn on the clear
execution command contact to clear
the contents of registers.
(b) Method by peripheral device
Set the register to "0" by changing the present value with the test function
of peripheral device or set to "0" by forced reset. For the operation
method, refer to the Instruction Manual for each peripheral device.
(c) By moving the RESET key switch at the CPU module front to the RESET
position, the special register is set to "0".
(3) Data is written to the special registers marked *2 in the sequence program.
(4) Data is written to the special registers marked *3 in test mode of the
peripheral device.
b15 b14 b13 b12 b11 b10 b9 b8 b7
Station Station Station Station Station Station Station Station
16 15 14 13 12 11 10 9 8
Station Station Station Station Station Station Station Station
32 31 30 29 28 27 26 25 24
Station Station Station Station Station Station Station Station
48 47 46 45 44 43 42 41 40
Station Station Station Station Station Station Station Station
64 63 62 61 60 59 58 57 56
App - 45
Details
—
b6 b5 b4 b3 b2 b1 b0
Station Station Station Station Station Station Station
7 6 5 4 3 2 1
Station Station Station Station Station Station Station
23 22 21 20 19 18 17
Station Station Station Station Station Station Station
39 38 37 36 35 34 33
Station Station Station Station Station Station Station
55 54 53 52 51 50 49
1: Error
0: Normal
Clear execution
command
RST
Special function register to be cleared
Usable with
A2C and A52G.
D9005