Omron SYSMAC C20P Operation Manual page 79

Timer and Counter Instructions
Upper and Lower Limit
Setting
The following table shows the upper and lower limits that need to be set in
DM 32 through DM 63. In this table, "S" denotes the present value of counter
47 and R is the results word.
Lower Upper
limit limit
DM 32 DM 33
DM 34 DM 35
DM 36 DM 37
DM 38 DM 39
DM 40 DM 41
DM 42 DM 43
DM 44 DM 45
DM 46 DM 47
DM 48 DM 49
DM 50 DM 51
DM 52 DM 53
DM 54 DM 55
DM 56 DM 57
DM 58 DM 59
DM 60 DM 61
DM 62 DM 63
The values must be four-digit BCD in the range 0000 to 9999. Note that fail-
ure to enter BCD values will not activate the ERR Flag. Always set a lower
limit which is less than the corresponding upper limit. MOV is useful in setting
limits. The following ladder diagram shows the use of MOV for setting limits
and the associated timing diagram shows the state of the relevant bits of the
result word (IR 05) as the counter is incremented.
Present value of the counter
Value of DM 32 S value of DM 33
Value of DM 34 S value of DM 35
Value of DM 36 S value of DM 37
Value of DM 38 S value of DM 39
Value of DM 40 S value of DM 41
Value of DM 42 S value of DM 43
Value of DM 44 S value of DM 45
Value of DM 46 S value of DM 47
Value of DM 48 S value of DM 49
Value of DM 50 S value of DM 51
Value of DM 52 S value of DM 53
Value of DM 54 S value of DM 55
Value of DM 56 S value of DM 57
Value of DM 58 S value of DM 59
Value of DM 60 S value of DM 61
Value of DM 62 S value of DM 63
Section 5–11
Bit of R
that turns
ON
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
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