2 Functions of Devices in DVP-PLC 1-phase 1 input high-speed counter Example: LD X10 RST C241 X10 LD X11 OUT M1241 X11 M1241 LD X12 X12 DCNT C241 K5 C241 LD C241 Y0 OUT Y0 1. X11 drives M1241 to determine whether C241 is an addition or subtraction counter. 2. When X10 is On, RST instruction will be executed and the PV in C241 will be cleared to “0” and the contact will be Off. 3. In C241, when X12 is On and C241 receives the signals from X0, the PV in the counter will count up (plus 1) or count down (minus 1). 4. When the counting of C241 reaches SV K5, the contact of C241 will be On. If there are still input signals from X0, the counting will continue. 5.
C241 in ES/EX/SS and SA/SX/SC series MPU has external input signals to reset X1. 6. C241 in EH2/SV/EH3/SV2 series MPU has external input signals to reset X2 and start X3. 7. The external input contact of reset signal of C241 (HHSC0) in EH2/SV/EH3/SV2 series MPU is disabled by M1264. The external input contact of start signal is disabled by M1265. 8. The internal input contact of reset signal of C241 (HHSC0) in EH2/SV/EH3/SV2 series MPU is disabled by M1272. The internal input contact of start signal is disabled by M1273. 9. The counting modes (normal frequency or double frequency) of C246 (HHSC0) in EH2/SV/EH3/SV2 series MPU can be set up by D1225.
The default setting is double frequency mode. DVP-PLC Application Manual 2-28 Flag Function D1225 ~ D1228 Counting modes of HHSC0 ~ HHSC3 in EH2/SV/EH3/SV2 series MPU (default = 2) 1: Normal frequency counting mode 2: Double frequency counting mode 3: Triple frequency counting mode 4: 4 times frequency counting mode RST C241 DCNT C241 K5