Omron SYSMAC C20K Operation Manual page 97

Timer and Counter Instructions
Example 5:
Flicker Bits
TIM 02
0000
TIM 01
TIM 01
0000
0205
1.0 s 1.5 s
5-11-2 HIGH-SPEED TIMER – TIMH(15)
Ladder Symbol
Limitations
Description
86
Bits can be programmed to turn ON and OFF at a regular interval while a
designated execution condition is ON by using TIM twice. One TIM functions
to turn ON and OFF a specified bit, i.e., the completion flag of this TIM turns
the specified bit ON and OFF. The other TIM functions to control the opera-
tion of the first TIM, i.e., when the first TIM's completion flag goes ON, the
second TIM is started and when the second TIM's completion flag goes ON,
the first TIM is started.
1.0 s 1.5 s
An easier but more limited method of creating a flicker bit is to AND one of
the SR area clock pulse bits with the execution condition that is to be ON
when the flicker bit is operating. Although this method does not use TIM, it is
included here for comparison. This method is more limited because the ON
and OFF times must be the same and they depend on the clock pulse bits
available in the SR area.
TIMH(15) N
SV
SV may be between 00.02 and 99.99 seconds. (Actually settings of 00.00
and 00.01 are allowed, but 00.00 is meaningless and 00.01 is not reliable.)
The decimal point of SV is not input.
Each TC number can be used as the definer in only one timer or counter in-
struction.
A cycle time of greater than 10 ms will affect the accuracy of the timer.
TIMH(15) operates the same as TIM except that TIMH measures in units of
0.01 second.
Refer to 5-11-1 TIMER – TIM for operational details and examples. All as-
pects except for the above considerations are the same.
Address Instruction
TIM 01
0000
#0010
1.0 s
0001
0002
TIM 02
#0015
1.5 s
0003
0004
0205
0005
0006
Definer Values
N: TC number
# (00 though 47 )
Operand Data Areas
SV: Set value (word, BCD)
IR, HR, #
Section 5-11
Operands
LD 0000
AND TIM
TIM
# 0010
LD TIM
TIM
# 0015
LD TIM
OUT 0205
02
01
01
02
01