User`s manual

Reference guide
50
Time channels
Controlling and changing time channels. To display time channels, you
must link system block 991 to a digital signal or jump to block 991. To read
or change a time channel value, select the time channel by moving the cur-
sor to the appropriate line. Press [+] and then read and/or change the time
interval. However, changes cannot be made to digital signals. To be able
to change the value of the time channel in Run mode, the alternative time
channels in the dialog Online changes must be marked in the configurati-
on.
8.7 Preprogrammed project
MAC 10/MTA-10
MAC 10/MTA-10 is supplied with a preprogrammed application project
which consists of one textblock.
Press the [→] [-] keys down continuously during power-up of the terminal
to install the preprogrammed project in the program memory.
The first text displayed is a menu which allows you to choose a language.
Move the cursor between the alternative using the keys [↑] and [↓].
Select the desired alternative by pressing [+].
The preprogrammed project includes a textblock. The objects in the text-
block are linked to timers, counters, memory cells, data registers and time
switches. Since the PLC program handles signals which are linked to ob-
jects listed in the textblock, you can use the terminal to change preset va-
lues for timers and counters, manoeuvrable digital and analog signals, as
well as the time intervals for time switches.