Flexible Automation
Central processing unit ZS400
4-22
1070 072 143-101
4.4.5 Loading the PLC program from a memory card
Loading the PLC program from a memory card is only possible if there is no
simultaneous access from the programming unit (monitor service pro
gram) or system bus to the PLC program memory of the ZS400. The pro
cedure is then aborted with the message
on the 7segment display.
CAUTION 4.5
Data loss!
The original content of the PLC program memory of the ZS400 will be
deleted when loading the PLC program from a memory card! Check
first whether the PLC program in the ZS400 may really be deleted! If
required, save the PLC program in the ZS400 by backing up the pro
gram on an additional memory card or a programming unit.
L Switch the ZS400 to Stop with the switch on the front panel.
Red Stop LED lights up.
7segment display:
L Insert memory card into ZS400, see fig. 4-18.
L Actuate rolling key until the display
appears.
L Actuate Lock output states switch. The position of the switch is of no
consequence.
If the Lock output states switch is not actuated within 5 s, the ZS400 reverts
to Stop status.
L Actuate rolling key until the desired function is displayed on the lower
7segment display:
D
Load the entire PLC program with data modules from a memory
card.
D
Load RAM 0 to 128 kByte with all organisation modules, program
modules 0 to 511 (system program modules) and all data modules
from a memory card.
D
Load RAM 128 to 256 kByte with program modules 512 to 1023
(standard program modules) from a memory card.