Tecomat TC600
TXV 138 08.02 4
User Program set of all user processes designed for control of the given
application
Multiprogramming
set of rules according to which individual user processes
are activated
Program Cycle set of user processes which are activated cyclically ac-
cording to rules of multiprogramming
Cycle Turn phase of the system program between the last process of
the past cycle and the first process of the new cycle. In
the cycle turn, values of outputs are transmitted from re-
gisters Y, new values of inputs are scanned into registers
X, time data in timers and system registers are updated,
and data received by communication channels and new
data for transmission are transferred
Cycle Interruption by User
updating of processes P41, P43 and P44. These proces-
ses may be activated in arbitrary position of the user
program cycle.
Initialization Processes
processes activated after turning on or restart of the
system (P62 after warm reboot, P63 after cold reboot)
User D Data
constants of the user program stored in memory of the
user program
User T Tables
most often constants of the user program concentrated in
integrated sets (T tables). They are usually used for defi-
nition of subsystems (decoders, combination, sequential,
time or numeric subsystems).
Configuration Constants, K Data
set of data in the user program memory designed for
setting of the system configuration and modification of
the system activity. Not available to the user program,
are edited from within the development environment. If
not edited, the system shows standard behaviour.
Scratchpad, Registers X, Y, S, R
part of the RAM memory available to the user as input
images (registers X), output images (registers Y), system
(S) and user (R) registers.
Remanent Part of the Scratchpad
part of registers R the contents of which is retained dur-
ing warm reboot. The extent may be selected by the
configurational constant of remanent registers R. Other
registers R and registers X and Y are not remanent and
are reset in every reboot or turning on. The user has the
possibility to store actual output values in remanent reg-
isters R.
Warm Reboot way of activation of the system and user program in
which the contents of the scratchpad remanent part are
retained. The rest of the scratchpad is reset.
Cold Reboot way of activation of the system and user program in
which all registers of the scratchpad are reset. Cold re-
boot is performed in the case that an attempt at warm
reboot has been non-successful (the system has detec-
ted damage of the stored data).
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