997
Block Programming Instructions Section 3-30
The present value of timers programmed with timer numbers T0 to T15 will be
updated even when the timer is on standby. The present value of timers pro-
grammed with timer numbers T16 to T4095 will be held when the timer is on
standby.
The timer numbers are also used by the other timer instructions. Operation
will not be predictable if the same timer number is used for more than one
timer instruction. Use each timer number only once. The only way that the
same timer number can be used dependably is if only one of the timers is ever
operating at the same time. An error will occur in the program check if the
same timer number is used in more than one timer instruction.
An error will occur and the Error Flag will turn ON if an indirect IR designation
is used for N in BCD mode and the address is not for a timer present value or
if SV is not BCD. An error will also occur and the Error Flag will turn ON if an
indirect IR designation is used for N in binary mode and the address is not for
a timer present value.
Examples In the following example, “B” will be executed 20 seconds after “A” whenever
CIO 0.00 is ON.
Program execution will flow from 2 to 3 to 4 and back to 2 during the 20 s
before “B” is executed, as shown in the following diagram.
Address Instruction Operand
000200 LD 0.00
000201 BPRG 0
.
.
A.
.
000210 TIMW 1
#0200
.
.
B.
.
000220 BEND ---
0
0.00
Timer times out.
To Next Page
Loading...
