SBC PCD2.M5 Series - Operating Mode Switch (Run;Halt); Run;Halt Push Button; Run;Halt Switch

Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Operating mode switch
PCD2.M5_ Classic CPUs and expansion housings
3-55
3
3.18 Operatingmodeswitch(Run/Halt)
3.18.1 Run/halt push button
The operating mode can be changed while in use or at start-up:
At start-up:
 If the Run/Halt push button is pressed during start-up and then released again during one
of the sequences described below, the following actions may be triggered:
LED sequence Action
Orange none
Green,ashing
(1Hz)
Goes into "Boot" state and waits for f/w down-
load
Red,ashingfast(4Hz);
fromFW>V01.08.45
The system starts in the same way as with a
atSuperCAPormissingbattery,i.e.me-
dia(ash,registersetc.),userprogramand
hardware settings are erased. The clock is set
to 00:00:00 01.01.1990. The backup on the
onboardashisnotdeleted.
Red,ashingslowly(2Hz) The PLC does not start up and goes into
"Stop" mode.
Red/greenashing(2Hz) Storeddatadeleted,i.e.media(ash,regis-
tersetc.),userprogram,hardwaresettings
andthebackupontheonboardashare
erased.However,whereanexternalash
card is used, the program is not copied to the
onboardash.
In operation:
 If the button is pressed in run mode for more than ½ second and less than 3 seconds,
the controller changes to halt mode and vice versa.
 If the push button is pressed for longer than 3 seconds, the last user program saved will
beloadedfromashmemory.
3.18.2 Run/halt switch
OnthePCD2.M5_,itisalsopossibletoinuencetheoperatingstatewith
the switch accessible on the front of the unit under the blue cover.
If the controller is switched to halt mode, this will cause a change from run to
halt;whenitisswitchedtorun,acoldstartwillbeexecuted.
Toreleasetheswitch,checktheoptionsinthePG5hardwaresettings(seesection8.1.2).