Assigning Parameters to and Calling the S7-Graph FB
S7-GRAPH for S7-300/400 Programming Sequential Control Systems
C79000-G7076-C526-01
9-13
9.7.3 Inching mode (SW_TAP)
To install or test a system step by step, the inching mode can be very useful:
• The sequencer switches when the transition is satisfied and there is an edge
change from 0 to 1 at the parameter T_PUSH.
Input Parameters of the Inching Mode
Parameters not listed are not mode-dependent.
Parameter Data Description
OFF_SQ BOOL All steps are immediately deactivated, in other
words "Sequencer Off"
INIT_SQ BOOL Initialize sequencer, jump to initial step
ACK_EF BOOL Acknowledgment of a disturbance
S_PREV BOOL As for automatic
S_NEXT BOOL As for automatic
SW_AUTO BOOL Request the automatic mode
SW_MAN BOOL Request manual mode
SW_TOP BOOL Set automatic or switch to next mode
T_PUSH BOOL The transition switches when its conditions are
satisfied and there is a rising edge at T_PUSH.
Output Parameters of the Inching Mode
Parameter Data Description
S_NO INT Step number, indicates the selected step
S_MORE BOOL Further active steps exist and can be indicated
in S_NO
S_ACTIVE BOOL The indicated step is active
ERR_FLT BOOL Error/disturbance occurred
AUTO_ON BOOL The automatic mode is not active
TAP_ON BOOL The inching mode is active
MAN_ON BOOL Manual mode is not active
TOP_ON BOOL Automatic or switch to next mode is not
activated
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