KEYENCE SR-750 Series - Manual (Page 109)

109 E SR-750 UM
12-1
PROFINET
PROFINET is the open communication standard specified by PI (PROFIBUS &
PROFINET International). PROFINET compatible devices can communicate
regardless of vendor. The SR-750 Series is compliant with Conformance Class A.
Also, the SR-750 Series supports cyclic communication.
Cyclic communication
Cyclic communication enables high-speed control at several ms to several tens of
ms intervals by communicating at update time interval. The SR-750 Series can be
controlled by referring to and updating variables or devices within PLC without
considering communication. This makes programs on the PLC side simpler.
Important When controlling the SR-750 Series, set the update time of cyclic
communication to 8 ms or longer.
SR-750 Series PROFINET function overview
Important Maximum read length is 246 digits.
Operation flow to start PROFINET communication
List of applicable PLC models
Siemens PLC
Function Description
Timing input control
Controls timing input ON/OFF.
Timing input with the parameter bank specified is possible.
Preset data control
Read OK data can be set as preset data.
Also, preset data can be registered or deleted from PLC.
Tuning Tuning can be performed by specifying the parameter bank.
Data handshake Whether to write read data to PLC can be controlled.
Error handling
Errors that occurred on the main unit can be checked.
After eliminating error factors, the SR-750 Series can be restored from the
error state.
Statistical
information
acquisition
Read count and read data update count can be checked.
Operation status
acquisition Read data can be acquired, and I/O status or marking verification result
can be checked.
(1) Check specifications.
• Check if the PLC to be connected is compatible with PROFINET connection.
• Check the input and output data allocation status.
(2) Make the PROFINET communication setting for the SR-750 Series.
Make this setting for PROFINET connection of SR-750 Series.
Setting items: IP address, subnet mask, default gateway, PROFINET
communication enable/disable, PROFINET device name, data
handshake enable/disable
(3) Establish PROFINET communication.
When registering the SR-750 information to PLC, use the GSDML file of
SR-750.
(4) Perform necessary tasks.
PLC series Software used Version of software used
S7-300 STEP 7 V5.5.0.0 and later versions
S7-400 STEP 7 V5.5.0.0 and later versions
S7-1200 STEP 7 Basic Version V11Update 1
Important Set the PROFINET device name avoiding the same device name
within the network.
The PROFINET communication cannot be made with the
temporary IP address set for the SR-750 Series. Be sure to set
the IP address.
When "Send Configuration" is performed after setting
PROFINET for the SR-750 Series, the SR-750 Series main unit
restarts.
PROFINET device naming rule
1. PROFINET device name length: 1 to 240 characters
2. 1 label length: 1 to 63 characters
3. Only [a to z] (alphabet lower case) [0 to 9] (numbers), [-] (hyphen), [.] (period)
can be used for a device name.
4. [-] (hyphen) cannot be used at the beginning of the label.
5. [-] (hyphen) cannot be used at the end of the label.
6. port-xyz, port-xyz-abcde cannot be the name of the first label.
a, b, c, d, e, x, y, z means [0 to 9] (numbers)
7. Device names cannot be made in the IP address format (n.n.n.n n=0,…,999).
8. Labels cannot start with xn-.
9. The first character of labels cannot be a number.
12-2
Cyclic communication
When cyclic communication is performed in the SR-750 Series using PROFINET,
SR-750 series functions are assigned to the PLC devices. Use the function
allocated to each device according to the intended usage.
Important Communication settings such as cyclic communication's
communication cycle and data size are performed in the PLC.
When there is a large load in the network which connects many
devices including PROFINET devices, delays or packet loss may
occur. Perform thorough verification before operation.
SR information area (I address)
The SR information area is divided into areas as follows.
Bit area
In the following areas, information is divided by bit.
Information is represented with 0 or 1.
Slot Size
Module
name
Bit
address
Name Description Data contents Remarks
1 1 byte
Handshake
and General
Error Status
Bits
0 Error Error status indication
0 : No error
1 : Error
1
Result Data
Available
Read data
Transmission buffer
retention status
indication
0 : No read data
1 : Read data
available
* Only when data
handshake is
enabled
2 Result Data Strobe
Read data
PLC update complete
flag
0 →1: Read data
update
complete
1 →0: -
3 (Reserved) Reserved area
4 (Reserved) Reserved area
5 (Reserved) Reserved area
6
Buffer Overflow
Error
Buffer overflow error
Cleared by Error
Clear Bit
0 : No error
1 : Error
7 General Error
SR operation failure
error
Cleared by Error
Clear Bit
0 : No error
1 : Error
SIMATIC
S7-300
Reading result
Handshake information
Device status
Busy/error information
Statistical information
Reading instruction
Handshake instruction
Tuning
Reading result
Handshake information
Device status
Busy/error information
Statistical information
Reading instruction
Handshake instruction
Tuning
SR information area
PLC instruction area
SR information area
PLC instruction area
Communication cycle
Set with PLC