Moriseiki ZL20 -MF-D4 control(1991) and Moriseiki ZL200- MSC-500(1999), G and M code

Hi everybody
I Have a problem with Fanuc control . Now i want to machining work part with A Turret both B turret in main spindle
But i don't know how to Idle stop Turret A or B to waiting for A or B Turret go to end block command
Ex : A turret now is machining, next step B Turret must be machining
How to call B turret to machining in Head 1 program ?
If can't call B Turret in Head 1, how to call B turret waiting for A turret end in Head 2 Program?
Because when MEM select key, A and B Turret also selected automatic, I Belive that must be make 2 programs for HEAD 1 and HEAD 2
In ZL200SMC machine, how to make program for both main with A Turrer maching and sub spindle with B turret machining? In Main spindle- X and is positive and Z is negative but , when make program for Sub spindle, how to do ?
I haven't any manual Programing because all machining are second hand machining

You didn't say which Fanuc controller you have so I have to guess. I picked the 18TT control. If it’s different then we are going to have to know that. What Fanuc gives you is two parameters where you set the Range of M codes that you want to wait with. So lets say you put in 55 in parameter 8111 and 56 in parameter 8112 then the control will look for M55 in either head then hold that head up till it sees the M55 in the other head. Then both heads take off together again.

Thankyou for your support,
I have find about, Mcode, it using M110 and M120 in sub program and main program
My control is Fanuc OM and Fanuc 18