
5. FUNCTIONAL INSTRUCTIONS
B–61863E/15
PMC SEQUENCE PROGRAM
172
This timer is used as a fixed on–delay timer. The variable timer in section
5.4 sets time of the timer into the nonvolatile memory, and can be reset
via the CRT/MDI when necessary.
Time present in this fixed timer is written to the ROM together with the
sequence program, so the timer time once set cannot be changed unless
the whole ROM is exchanged.
The format is expressed as follows (Fig.5.5.2).
ACT
TMRB
(SUB24)
fff
Timer
number
TMB
fff
f····· f
Preset
time
Timer relay
Fig. 5.5.2 Format of TMRB
ACT=0: Turns off timer relay
(TMB
fff).
ACT=1: Start timer.
As shown in Fig.5.5.4, timer relay is set ON after certain time preset in
the parameter of this instruction pasts after ACT=1.
The designer will decide the address of the internal relay in the timer relay.
TMB
ACT
T indicates the time set in this timer
command.
T
Fig. 5.5.4 Timer operation
(a) Timer number
Sets timer number (1 to 100) of the fixed timers.
For the PMC–SB7, set a number between 1 and 500.
WARNING
If the same timer number is used more than once or if a timer
number out of the valid range is used, operation is
unpredictable.
5.5
TMRB (FIXED TIMER)
5.5.1
Function
5.5.2
Format
5.5.3
Control Conditions
5.5.4
Timer Relay
(TMBfff)
5.5.5
Parameter