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Modbus/TCP Server Function Specification Additional Manual Page 3

Additional Manual
3
/
３
Edit
Apprv
Desig.
Date
Description
Date
Feb.8, 2005
N.Mutai
01
Feb.8, 05
N.Mutai
Sheet
Title
Draw
No.
Modbus/TCP server function
Specification
A
-
90006
Initial
02
Mar.10, 05
N.Mutai
Modification of Chap 2 and 4, Addition of Chap
4. Server design of FANUC MODBUS/TCP function
- “Automatic TCP connection management” is implemented. (“Explicit TCP connection
management” is not supported. So, user application (such as Ladder program) does
not need to take care of TCP connection.)
- The server function can accept to simultaneously several MODBUS requests.
- All of requests are accepted on the rule of “non-priority connection pool”that closes the
oldest connection when a new connection request arrives and there is not more
connection available in the pool. And, “Priority connection pool” is not supported.
- “Access control service” is not supported. So All of device can be accessed without
authorization.
5. Relationship with ladder program and other field network I/O
A Ladder program processing and other field network I/O refresh timing are not synchronous
with DI/DO data by the reading/writing MODBUS/TCP server function. So, when creating a
ladder program, the user needs to pay sufficient attention to the concurrency of data.
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Contents Summary of Modbus/TCP Server Function Specification Additional Manual

  • Page 1MODBUS/TCP server function Specification Title Modbus/TCP server function Specification Draw No. A-90006 02 Mar.10, 05 N.Mutai Modification of Chap 2 and 4, Addition of Chap 01 Feb.8, 05 N.Mutai Initial Edit Date Design Description Sheet 1/３ Date Feb.8, 2005 Desig. N.Mutai Apprv
  • Page 21. Outline FANUC MODBUS/TCP function supports MODBUS Server function (Client is not supported), and is applied to FANUC Series 16i/18i/21i-B with PMC-SB7/SD7. (In future step, it will be supported for Series 30i/31i/32i-A, too.) 2. MODBUS addressing model FANUC MODBUS/TCP function assigns PMC addres
  • Page 34. Server design of FANUC MODBUS/TCP function - “Automatic TCP connection management” is implemented. (“Explicit TCP connection management” is not supported. So, user application (such as Ladder program) does not need to take care of TCP connection.) - The server function can accept to simultaneousl