1-phase 1-input counter (K8 to K11)
1-phase 2-input counter (K6, K7)
2-phase counter (K0 to K5)
+1
+1
-1
●
Hardware UP/DOWN (K8, K9)
BFM #1
Phase B
K0
K1
ON
OFF
UP
DOWN
Current
value
UP/DOWN is de-
termined by the
contents of BFM
#1, (K0/K1).
●
2 edge-count counter (K2, K3)
Phase B input ON
→
OFF while phase
A input ON Count
down by 1.
+1
+1
-1
Phase A
Phase B
●
4 edge-count counter (K4, K5)
UP COUNT :
DOWN COUNT :
●
1 edge-count-counter (K0, K1)
(c)
(d)
Phase A
Phase B
OFF
ON
ON
OFF
UP
DOWN
Current
value
UP/DOWN is
determined by
input phase A
(ON/OFF).
●
Software UP/DOWN (K10, K11)
Phase
B input
Phase
A input
ON
OFF
ON
OFF
1 2 3 3 3 2 1 0
Phase A input -1 at
OFF
→
ON.
Phase B input+1 at
OFF
→
ON.
If both phase A and phase B inputs are received
simultaneously, the counter value dose not
change.
(e)
Phase A
Phase B
Phase B input ON
→
OFF while phase
A input ON Count
down by 1.
Phase B inputOFF
→
ON while phase
A input ON Count
up by 1.
Phase B input OFF
→
ON while phase
A input ON Count
up by 1.
+1
+1
+1
+1
Phase A input
Phase B input
Phase A input
Phase B input
-1
-1
-1
-1
