Rockwell Automation 1770-KF2 Data Highway or Highway Plus Interface Module User Manual - Manual (Page 162)

Error Reporting
Chapter 7
7Ć7
88 Execution of protected commands at the remote station is inhibited because its PROG
light is on. This error results in setting the remote error bit for the associated rung. This
error code corresponds with STS Code 80.
89 The remote station has no memory to store messages. This error will only be signaled
after 5 retries at halfĆsecond intervals. It indicates that either a very heavy traffic load is
being presented to the remote station, or that the dynamic memory of the remote station
is corrupted. If the problem clears up after cycling power and does not recur, the cause
may be RAM or CPU failures triggered by heat or noise. If the problem recurs
repeatedly, the probable cause is too many messages. This error code corresponds with
STS Code 90.
91 The RSĆ232ĆC port is not connected to a device, or the DSR pin is not being asserted
(high = true). This error code corresponds with STS Code 01.
92 The local station cannot confirm delivery of a command message to the remote station.
This does not necessarily mean that the message was not sent or that the done bit or
remote error bit will not be set. It is possible, but not probable, that the message will be
executed at the remote station. The local error bit will be set by this error. If the done or
remote error bits are set , they will occur after the local error bit. Reasons for this error
include:
• Disconnection of the Data Highway
• Noise on the Highway
• Bad Cabling or Connections
• Remote Station Is Powered Off
• Remote Station Does Not Exist
• Wrong Station Address Is Being Used
• Remote Module Is Faulted
• Some Module on the Highway Is in a Bus Hog" Condition and Prevents Proper
Operation of the Highway
If an Error 92 persists, the internal diagnostic counters should be used to pinpoint the
location of the faulty module or cable. This error code corresponds with STS Code 02.
93 This error will occur if the local module, while attempting to send a message, detects
another master on the highway. The local error bit for the rung that sent the message
will be set. Like Error 92, this error does not mean that the message was not received.
It is quite probable that the message will be executed. If it is, the done bit or remote
error bit may be set after the local error bit if the start bit stays on. If the start bit is
unlatched by the local error bit, a 53 or 56 error may result. Occurrence of this error is
probably related to general highway conditions, not to the message or the stations
sending and receiving it. The message should be retried. Possible causes of this error
are:
• connection of two operating highways,
• connection of a powered up module to an operating highway,
• noise on the highway, or
• bad cabling or connections.
Error 93 is rare but not impossible on a wellĆfunctioning highway. If it persists, the
internal diagnostic counters should be used to pinpoint the location of the faulty module
or cable. This error code corresponds with STS Code 03.