IDEC MICROSmart FC6A Series User Manual page 396

6: D
EVICES
■ M8121: 1-s Clock
While M8001 is off, M8121 generates clock pulses in a 1 s cycle, with a duty
ratio of 1:1 (500 ms on and 500 ms off).
■ M8122: 100-ms Clock
M8122 generates clock pulses in a 100 ms cycle, with a duty ratio of 1:1
(50 ms on and 50 ms off).
■ M8123: 10-ms Clock
M8123 generates clock pulses in a 10 ms cycle, with a duty ratio of 1:1
(5 ms on and 5 ms off).
■ M8124: Timer/Counter Preset Value Changed
When timer or counter preset values are changed, M8124 is turned on. When a user program is transferred or when the
changed data is cleared, M8124 is turned off.
■ M8125: In-operation Output
M8125 is on during the run status.
■ M8126: Scan ON After Run-Time Download Completes
When the user program is changed during the run status (run-time download), after the download completes, M8126 is turned
on for one scan only when the user program starts operation.
■ M8137 to M8143, M8167: Interrupt Input Status
These relays are turned on when the corresponding user interrupt is allowed. These relays are turned off when the user
interrupt is prohibited.
M8137 = Interrupt input I0 status
M8140 = Interrupt input I1 status
M8141 = Interrupt input I3 status
M8142 = Interrupt input I4 status
M8143 = Interrupt input I6 status
M8167 = Interrupt input I7 status
■ M8144: Timer Interrupt Status
When the timer interrupt is allowed, M8144 is turned on. When the timer interrupt is prohibited, M8144 is turned off.
■ M8150 to M8152: Comparison Result
M8150 to M8152 turn on according to the comparison results of the CMP= (Compare(=)) instruction and the ICMP>= (Interval
Compare) instruction.
For details, see Chapter 6 "Special Internal Relays M8150, M8151, and M8152 in ICMP>=" in the "FC6A Series MICROSmart
Ladder Programming Manual".
■ M8153 to M8160: Catch Input ON/OFF Status
When the rising or falling input edge of the input contact specified as the catch input is detected during a scan, the input contact
status is captured. The detectable edges are once per scan.
M8153 = Group 1/I0 status
M8154 = Group 2/I1 status
M8155 = Group 3/I3 status
M8156 = Group 4/I4 status
M8157 = Group 5/I6 status
M8160 = Group 6/I7 status
■ M8172 to M8175: Transistor Source Output Overcurrent Detection
When overcurrent output occurs in a transistor protection source output on the CPU module, a special internal relay (M8172 to
M8175) is turned on. The following special internal relays have been allocated with four outputs set as one group. If overcurrent
output occurs in any of the special internal relays, it is turned on.
6-12 FC6A S MICROS U
ERIES MART
500 ms
M8121
1 s
50 ms
M8122
100 ms
5 ms
M8123
10 ms
' M FC9Y-B1722
SER S ANUAL
500 ms
50 ms
5 ms