Siemens SIMATIC NET S7-300 User Manual

7 Programming FCs (Functions) and FBs for S7 Ethernet CPs
A-216
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
How the Block Works
The following diagram shows a typical sequence of AG_CNTRL jobs in the user
program.
User program
(CPU cycle)
Ethernet CP
AG_CNTRL (status query)
Status connection ID1
1)
supply AG_CNTRL for status query:
ACT = 1; CMD=1
ID =1 (connection)
Status query for connection
1 is acknowledged
Legend:
1)
Parameter transfer DONE, ERROR, STATUS and RESULT1/2
Time
Time
An event is detected that makes it
useful to abort and reestablish a
connection.
AG_CNTRL (reset command)
supply AG_CNTRL for reset:
ACT = 1; CMD=2
ID =1 (connection)
Reset request active:
Reset ID (bit 15 in
RESULT1) is set
Acknowledgment of job
acceptance:
RESULT1: “connection
establishment triggered”
1)
Connection is terminated
and reinitialized:
Reset ID (bit 15 in
RESULT1) remains set
AG_CNTRL (status query)
Status connection ID1
1)
supply AG_CNTRL for status query:
ACT = 1; CMD=1
ID =1 (connection)
Status query is
acknowledged;
then the reset ID (bit 15 in
RESULT1) is cleared
Acknowledgment:
RESULT1: B095
H
“Reset was executed”
1)
Entry in diagnostic
buffer
The diagram shows how the connection status is initially queried and then, in a
second job, how the connection termination is triggered with the reset command.
FC10 AG_CNTRL - continued

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)