Is it possible to add a timer/timed event in a batch or txt file?

for example.  I have written a program that sends information to a
computerized induction furnace through a rs port.  here is what I have
in the txt file

1,amps,50
1,hon

what the above does is sets the heating element to 50 amps, and then
turns the heating element on (hon).  In this program I can have a timer
to set how long it will run the heat for with an item like this:
1,timer,30  (setting the timer to 30 seconds).  however...what I am
REALLY trying to accomplish, is to have it do something like the
following, but the program cannot

1,amps,50
1,hon
1,timer,30
1,hoff
1,amps,300
1,hon
1,timer,30

The above would set the amps to 50 and30 seconds, then turn off and
immediately set the amps to 300 and 30 seconds.  the prog cannot do
that...so is there a way to have the actual text or batch file, use the
computers timer to send programs at a timed point?  like the computer
would send the first part of the program, then after 30 seconds, it
would send the second part of it.  that would accomplish what I want,
but I cannot.  I can do it manually, but that is not what I want to
do...less thinking for my employees is what I need

thanks in advance
scott