Siemens Simatic S7 Series System Manual

Open loop motion control
12.6 Subroutines created by the Motion wizard for the Axis of Motion
S7-200 SMART
508 System Manual, 09/2015, A5E03822230-AC
Table 12- 7 Parameters for the AXISx_CTRL subroutine
Inputs/Outputs
Data type
Operands
MOD_EN
BOOL
I, Q, V, M, SM, S, T, C, L, Power Flow
Done, C_Dir BOOL I, Q, V, M, SM, S, T, C, L
Error
BYTE
IB, QB, VB, MB, SMB, SB, LB, AC, *VD, *AC, *LD
C_Pos, C_Speed DINT, REAL ID, QD, VD, MD, SMD, SD, LD, AC, *VD, *AC, *LD
The MOD_EN parameter must be on to enable the other motion subroutines to send
commands to the Axis of Motion. If the MOD_EN parameter turns off, then the Axis of Motion
aborts any command that is in progress and performs a decelerated stop.
The output parameters of the AXISx_CTRL subroutine provide the current status of the Axis
of Motion.
The Done parameter turns on when the Axis of Motion completes any subroutine.
The Error parameter (Page 545) contains the result of this subroutine.
The C_Pos parameter is the current position of the Axis of Motion. Based upon the units of
measurement, the value is either a number of pulses (DINT) or the number of engineering
units (REAL).
The C_Speed parameter provides the current speed of the Axis of Motion. If you configured
the measurement system for the Axis of Motion for pulses, C_Speed is a DINT value
containing the number of pulses/second. If you configured the measurement system for
engineering units, C_Speed is a REAL value containing the selected engineering
units/second (REAL).
The C_Dir parameter indicates the current direction of the motor:
● Signal state of 0 = positive
● Signal state of 1 = negative
Note
The Axis of Motion reads the configuration/profile table only at power
-up or when
commanded to load the configuration.
•
If you use the Motion wizard to modify the configuration, then the AXISx_CTRL
subroutine automatically commands the Axis of Motion to load the configuration/profile
table every time the CPU changes to RUN mode.
•
If you use the Motion control panel to modify the configuration, clicking the Update
Configuration button commands the Axis of Motion to load the new
configuration/profile table.
•
If you use another method to modify the configuration, then you must also issue an
AXISx_CFG command to the Axis of Motion to load the configuration/profile table.
Otherwise, the Axis of Motion continues to use the old configuration/profile table.

Siemens Simatic S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.