Siemens SIMATIC S7-300 Manual page 162

Human-machine interface
Figure 8-3 describes the functions of the global function keys for the user
interface of the OP 17.
ESC key
K1 Function key
Function key
K2
Function key
K3
Function key
K4
Function key
K5
Function key
K6
F1 ... F8
Note
The screens of the user interface (see Figure 8-3 and description of the indi-
vidual screens) contain display fields and input/output fields. These fields
contain values of configured variables.
The pending errors are displayed in the errors line. More detailed error in-
formation is provided on the screens "Diagnostics, Troubleshooting" and
"Interrupt messages."
8-10
You can use this key to call up the previous screen of the higher level (the
table of contents in the main screen).
You can use this key to jump from any point on the menu tree to the main
screen (PIC7).
You can use this key to jump from any point on the menu tree to the diagnos-
tics, error message screen (PIC77).
You can use this key to jump from any point on the menu tree to the operat-
ing mode selection screen (PIC75).
OP 17 "Offline" operating mode selection
OP17 "Online" (normal) operating mode selection
OP 17 "Transfer" operating mode selection
F1 to F8 (local soft keys)
The display fields are addressed to the DB-SS ("Control 2," DB1000)
and are read directly from the FM 354.
The input/output fields are addressed to user DB No.: 1 (control 1-CPU).
– Transmission of these values occurs from the OP 17 to the CPU into
the user DB. These values (if needed) must be transmitted to the
FM 354 by the user program.
– If certain values or control signals can be written only under the right
conditions (e.g. if axis is in HOLD mode or selection of a certain op-
erating mode is required), then the user program must ensure, by ana-
lyzing the response signals, that these conditions are met.
FM 354 Servo Drive Positioning Module