7BCOMMUNICATION IN SIMATIC S7
8.4.17 RESTART:= "DB_SIWA_U".bo_RESTART
During the start-up of the control program in OB100, the variable RESTART is set
by the user. The FB_SIWA_U recognizes the set variable in the cyclical program,
sets the variable START_UP, and deletes, where appropriate, commands which
have not been processed internally. Then the FB resets the two variables
RESTART and START_UP and accepts new commands.
8.4.18 CMD_EN:= "DB_SIWA_U".bo_CMD_EN
After the entry of the command number in the variable CMD_IN:=
"DB_SIWA_U".i_CMD_INPUT, the execution of the command is triggered with this
bit. To prevent the command from being triggered more than once, the bit should
be created as an edge. After execution of the command, the FB SIWA_U resets
the trigger variable CMD_EN:= "DB_SIWA_U".bo_CMD_EN.
8.5 Allocation of the scale DB
There are variables that are available in the SIMATIC-CPU in the scales DB. The
structure corresponds to the data record structure. The variable names are in
English.
8.6 Process alarms
The exceeding of limit values 1 or 2 can - depending on the selection in the basic
data of SIWAREX U in the HW config. - trigger a process alarm.
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SIWAREX U
Summary of Contents for Siwarex U
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