
Communication Layers' Attributes
Appendix D
D-9
Transport-Layer Parameters:
Description:
Connect Request Protocol Error Detected
Limit
A threshold level on the Connect Request Protocol Error
counter.
Unsuccessful Connect Request Limit
A threshold level on the Unsuccessful Connect Request
counter.
Detected TPDU Protocol Error Limit
A threshold level on the Detected TPDU Protocol Error counter.
Refused TPDU Protocol Error Limit
A threshold level on the Refused TPDU Protocol Error counter.
Discard TPDU Checksum Fail Limit
A threshold level on Checksum counter.
Timeout Limit
A threshold level on the Timeout counter.
Window Time
An integer that specifies the maximum time elapsed before this
transport entity will transmit updated window information.
Checksum
An integer that specifies the usage of the optional checksum in
a TPDU header. A value of 0 is interpreted as Checksum
disabled
. A value of 1 is interpreted as Checksum
enabled
.
Local Acknowledge Delay Time
An integer that specifies the maximum time (in milliseconds)
that this transport entity will wait to acknowledge a received
TPDU.
Maximum TPDU Size
This specifies the maximum TPDU size that this transport
entity can support. This number will be sent out on connect
request TPDU's by this transport entity.
Transport-Layer Counters:
Description:
Connect Request Congestion
The number of times a connection request (CR TPDU) is
refused due to congestion.
Conn. Req. Err. Config. Detected
The number of transport connection rejections sent by this
transport entity due to a configuration error.
Conn. Req. Refused Conf. Err.
The number of transport connection rejections received by this
transport due to a configuration error.
Conn. Req. Prot. Err. Detected
The number of transport connection rejections sent by this
transport entity due to a protocol error.
Unsuccessful Connect Request
The number of transport connection rejections sent by this
transport entity due to an unsuccessful connect request.
Detected TPDU Protocol Error
The number of invalid TPDUs (except for connect request
TPDUs) received by this transport entity.
Refused TPDU Protocol Error
The number of disconnect request and error TPDUs received
by this transport entity in response to any TPDU that is not a
connect request TPDU.
Discarded TPDU Checksum Failure
The number of TPDUs discarded to a checksum error.
Timeout
The number of times the transport layer times out when
attempting to transmit a TPDU. A timeout error occurs when
the peer transport layer does not acknowledge a previously
transmitted TPDU.
TPDU Sent
The number of times a TPDU is sent.
TPDU Received
The number of times a TPDU is received.
TPDU Retransmission
The number of TPDU retransmissions due to loss or error.
Advertizable Credit Reduced to Zero
The number of times a transport entity sends an AKTPDU
Summary of Contents for PLC-5 MAP/OSI
Page 1: ...PLC 5 MAP OSI Software User Manual Cat No 1785 OSI AB Parts...
Page 4: ...Table of Contents iii OSI Layer Management E 1...
Page 57: ...Chapter 4 Basic Programming Techniques 4 7 For example B7 6 10 AB Parts...
Page 91: ...Mapping MMS Data Types onto PLC 5 40 5 60 File Types Appendix A A 2 T ACC D 16 AB Parts...