Schneider Optics Web Embedded Server - Manual (Page 41)

The MSTR Instruction
840 USE 115 00 Version 1.0 31
CTE Error Codes The following error codes are returned if there is a problem with the Ethernet
configuration extension table (CTE) in your program configuration.
3.2.4 Read and Write MSTR Operations
An MSTR Write operation (type 1 in the displayed register of the top node)
transfers data from a master source device to a specified slave destination device
on the network. An MSTR Read operation (type 2 in the displayed register of the
top node) transfers data from a specified slave source device to a master
destination device on the network. Read and Write use one data master transaction
path and may be completed over multiple scans.
Note: TCP/IP Ethernet routing must be accomplished via standard third-party
Ethernet IP router products.
Control Block
Utilization The registers in the MSTR control block (the top node) contain the Read or Write
information as described in the following table:
Hex Error Code Meaning
5047 The MTU is invalid
5048 The hardware length is invalid.
5049 The route specified cannot be found.
504A
Collision in select call: these conditions have already been selected by
another task.
504B The task id is invalid.
Hex Error Code Meaning
7001 There is no Ethernet configuration extension.
7002 The CTE is not available for access.
7003 The offset is invalid.
7004 The offset + length is invalid.
7005 Bad data field in the CTE.
Register Function Content
Displayed Operation Type 1 = Write, 2 = Read.
First Implied Error status Displays a hex value indicating an MSTR error.
Exception response, where
response size is incorrect. Exception code
+ 3000
Exception response where
response size is incorrect. 4001
Read Write