Technical data

Appendix
27.6 Sample Programs
Programming with STEP 7
Manual, 05/2010, A5E02789666-01 641
Symbolic Addresses for Sensors and Displaying the Level of the Tank
Symbolic Name Address Data Type Description
Tank_below_max I1.3 BOOL Sensor "mixing tank not full"
Tank_above_min I1.4 BOOL Sensor "mixing tank above minimum level"
Tank_not_empty I1.5 BOOL Sensor "mixing tank not empty"
Tank_max_disp Q9.0 BOOL Lamp for "mixing tank full"
Tank_min_disp Q9.1 BOOL Lamp for "mixing tank below minimum level"
Tank_empty_disp Q9.2 BOOL Lamp for "mixing tank empty"
Symbolic Addresses for the Drain Valve
Symbolic Name Address Data Type Description
Drain_open I0.6 BOOL Button for opening the drain valve
Drain_closed I0.7 BOOL Button for closing the drain valve
Drain Q9.5 BOOL Activates the drain valve
Drain_open_disp Q9.6 BOOL Lamp for "drain valve open"
Drain_closed_disp Q9.7 BOOL Lamp for "drain valve closed"
Symbolic Addresses for the Other Program Elements
Symbolic Name Address Data Type Description
EMER_STOP_off I1.6 BOOL EMERGENCY STOP switch
Reset_maint I1.7 BOOL Reset switch for the maintenance lamps on all motors
Motor_block FB1 FB1 FB for controlling pumps and motor
Valve_block FC1 FC1 FC for controlling the valves
DB_feed_pump_A DB1 FB1 Instance DB for controlling feed pump A
DB_feed_pump_B DB2 FB1 Instance DB for controlling feed pump B
DB_agitator DB3 FB1 Instance DB for controlling the agitator motor