Siemens SIMATIC NET S7-300 User Manual

7 Programming FCs (Functions) and FBs for S7 Ethernet CPs
A-211
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
7.4.1 FC7 AG_LOCK
Meaning of the Block
Using the AG_LOCK block the data exchange using FETCH or WRITE on the
connection selected with the parameter ID is disabled. The LOCKED output
indicates whether or not the lock was successful. If the lock was not successful,
the job must be triggered again in a later CPU cycle.
The STATUS output indicates the status of the CP for this connection.
Call
Call interface in FBD representation
LADDR
AG_LOCK
ID
STATUS
LOCKED
Example in STL representation
STL Explanation
call fc 7
ID := DB 100.DBW 2
LADDR := W#16#0100
LOCKED := DB 100.DBX 0.6
STATUS := DB 100.DBW 4
//Block call
//Connection ID acc. to configuration
//=LADDR 256 dec. in hardware configuration
//Status code of access lock
//Status code
Explanation of the Formal Parameters
The following table explains all the formal parameters for the AG_LOCK function:

Siemens SIMATIC NET S7-300 Specifications

General

Product Type Designation	SIMATIC NET S7-300
Mounting	DIN rail mounting
Protection Class	IP20
CPU Models	Various models available (e.g., CPU 312, CPU 314)
Communication Interfaces	MPI, PROFIBUS DP
Power Supply	24 V DC power supply required. Different power supply modules available.
I/O Modules	Digital input modules, digital output modules, analog input modules, analog output modules
Programming	STEP 7 software
Supply Voltage	24V DC or 120/230V AC (depending on model)
Digital Inputs	Available via digital input modules
Digital Outputs	Available via digital output modules
Analog Inputs	Available via analog input modules
Analog Outputs	Available via analog output modules
Communication Functions	MPI, PROFIBUS DP, Ethernet (depending on model)
Protocols	MPI, PROFIBUS DP, TCP/IP (depending on model)
Operating Temperature	0°C to 60°C
Storage Temperature	70 °C
Memory	Depends on CPU model (e.g., 32 KB to 1.5 MB)