JUMO 705001 mTRON T - Central Processing Unit Operating Manual - Manual (Page 37)

37
5 Operation
"Origin" reset:
The "origin" reset is initialized by holding the switch in the "Reset" position between 2 s and
10 s, briefly releasing it (between 0.25 s and 3 s), and then holding it in the "Reset" position
again between 2 s and 10 s.
An "origin" reset resets the system bus (master starts again, data of the modules on the bus is
read in again) and deletes the bus configuration.
The PLC performs a full reset, which means that the PLC program and the retain area are de-
leted (see CoDeSys documentation on origin (full) reset of PLC).
The retain variables of external inputs (interfaces) are reset.
The system enters "Init" state.
 Chapter 5.2 "System states", page 34
An event message is issued (origin reset).
2 s < t < 10 s
0,25 s < t < 3 s
2 s < t < 10 s
t > 3 s
Reset
Stop
Reset
Stop
S
BE
t > 2 s t > 2 s t > 3 s
NOTE!
A "origin" reset is also possible during the basic initialization of the system. For this purpose,
after switching on the system, the switch must be held in the "Reset" position until the reset
sequence starts (observe the LEDs). This makes it possible, for example, to delete a faulty
PLC program that would otherwise block the start of the system.
CAUTION!
An "origin" reset deletes the entire configuration.
The system can no longer be started in the "Run" switch position.
To operate the system again, the configuration – incl. PLC program and bus configuration –
must be loaded into the central processing unit with the setup program.