Specifications

Process Images Appendix
Quick Start Guide for the MELSEC STlite Series A - 13
Status byte S0
Fig. A-15: Status byte S0 of the STL-ENC
Bit Name Description
0LATC_VAL
Acknowledge bit for EN_LATC (control byte C0, bit 0)
앫 Latch Mode:
This bit is set with a positive edge at input C. It is reset when EN_LATC is reset.
앫 Preload Mode:
This bit is set with a positive edge at C. It is reset when EN_LATC is reset.
1 LAT_EXT_VAL
Acknowledge bit for EN_LAT_EXT (control byte C0, bit 1).
앫 Latch Mode:
This bit is set with a positive edge at the input Latch. It is reset when EN_LAT_EXT is
reset.
앫 Preload Mode:
This bit is set with a positive edge at the input Latch. It is reset when EN_LAT_EXT is
reset.
2 CNT_SET_ACK
Acknowledge bit for CNT_SET (control byte C0, bit 2).
Reset if CNT_SET = 0
3UNDERFLOW
This bit is set (1) with a counter underflow of 00000000
H to FFFFFFFF H .
This bit is reset (0)
– if counter < AAAAAAAA
H
– with the positive edge of ResetUnderflow (control byte C0, bit 3)
–if OVERFLOW = 1
4OVERFLOW
This bit is set (1) with a counter overflow of FFFFFFFF
H to 00000000 H .
This bit is reset (0)
– if counter > 55555555
H
– with the positive edge of ResetOverflow (control byte C0, bit 4)
–if UNDERFLOW = 1
5AckSet LoadExt
Acknowledge bit for SetLoadExt.
Reset if SetLoadExt = 0 (control byte C0, bit 5)
Tab. A-13: Description of the status byte S0 of the STL-ENC
b7 b6 b5 b4 b3 b2 b1 b0
0/10/10/10/10/10/1X0Status byte S0
LATC_VAL
LAT_EXT_VAL
CNT_SET_ACK
UNDERFLOW
OVERFLOW
AckSet LoadExt
Reserved
Reserved