Allen-Bradley PLC-5 User Manual page 95

Status Field
Messages Tab (Messages = SDA messages + SDN messages)
Messages sent
Messages sent with error
Messages received
Messages received with
error
Messages unable to receive word 4
Monitoring messages
Location Description
word 1 Displays the number of messages sent by the channel.
word 3 Displays the number of messages containing errors sent by the channel.
word 0 Displays the number of error-free messages received by the channel.
word2 Displays the number of messages containing errors received by the channel (such as bad CRC).
Displays the number of messages received with protocol-related problems (such as a bad
block-transfer status byte with both read and write bits set).
Communicating with Remote I/O
Publication 1785-UM012D-EN-P - July 2005
6-23