Master Status 2 (Word N+6) - Omron SYSMAC CS Series Operation Manual

Allocated CIO Area Words
4-2-5

Master Status 2 (Word n+6)

Word n+6 [n = CIO 1,500 + (25 x unit number)]
Bit Name
00 Disturbed Bus ON
error
OFF
01 PROFIBUS proto- ON
col error
OFF
02 Double Master ON
address error
OFF
03 Hardware error ON
OFF
04 Reserved by sys- ---
to tem
11
120
The Master Status 2 word collects all error information on the Unit master
function. The status information is collected in the Master Status 1 word.
The contents of the Master Status 2 word (Word n+6) are:
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Word n+6
Status Controlled
by
Unit When turned ON, the Disturbed Bus error indicates that distorted mes-
sages have been received by the Unit. This may occur if the network is
not properly terminated or a cable is used, which is too long for the
selected baud rate.
Unit Indicates that no Disturbed Bus error has occurred.
Unit The PROFIBUS Protocol error flag will be turned ON if an error has
occurred in the protocol handling, e.g. a transmitted token frame could
not be read back.
Note In case this error occurs, the Unit will automatically switch to
Unit Indicates that no PROFIBUS protocol error has occurred.
Unit The Double Master Address error flag will be turned ON if there is
another master on the bus with the same with the same device address
as the CS1/CJ1W-PRM21.
Note In case this error occurs, the Unit will automatically switch to
Unit Indicates that no Double Master Address error has occurred.
Unit The Hardware error flag will be turned ON if an error has occurred on
the bus, e.g. message exceeding 256 bytes, broken messages, faulty
bus timing or devices beyond the HSA have been detected.
Note In case this error occurs, the Unit will automatically switch to
Unit Indicates that no Hardware error has occurred.
--- These bits will be set to OFF by the Unit.
Unit operation
OFFLINE mode.
OFFLINE mode.
OFFLINE mode.
Section 4-2
Disturbed bus error
PROFIBUS protocol error
Double Master address error
Hardware error
Mode command error
Parameter error