Technical data

A-B SuperBridge Technical Reference
16
MC General Alarms or Warnings, N12:3,11,19..(x_ALARMS)
Any current general alarms or warnings in the MC is visible as a bit in this integer. MCs have a
maximum of 16 general alarms or warnings. There is one bit per alarm. The interrogation is a part
of the fast loop. To find out about MC general alarms and warnings, see General Alarms (page
24).
Request Done Bits, N12:4,12,20..(x_REQDONE)
This integer contains the "Done" bits for requests set by the user in the MC Request Word. The
Done bits are always set when a request has been completed. If the request caused an error, the
Request Error Bits, N12:5,13,21..(x_REQERR) will indicate what kind of errors that were
encountered. The bits are mapped in the same way as the bits in the MC Control Word,
N13:4,11,18.., (page 17). The done bits for Download Setpoint, and Download Secondary
Setpoint are set at the first successful setpoint download, and remain set until the request bit is
cleared, or a problem occurs. Setpoints are continuously downloaded, when they change.
Request Error Bits, N12:5,13,21..(x_REQERR)
This integer contains the "Error" bits for the last request executed in the MC Request Word. If no
errors were encountered, all bits are cleared. The bits are mapped as follows:
Bit 0 (0001)
(x_RQEOFL)
MC is off-line or in communications failure. Request could not be performed.
Bit 1 (0002)
(x_RQENOS)
The request is not supported for this MC model.
Bit 2 (0004)
(x_RQEACC)
No access. The requested function could not be performed because of access
restrictions.
Bit 3 (0008)
(x_RQEKEY)
Keyboard problems. A remote keyboard request was issued when the MC was
not in root node. No remote keystroke was sent.
Bit 4 (0010)
(x_RQEREG)
A register number is addressed that does not exist in the MC model.
Bit 5 (0020)
(x_RQEVAL)
The value used for updating a register is too large to fit in the actual register
type.
Bit 6 - 15 Reserved.
Request Integer Result, N12:6,14,22..(x_INTRES)
This integer contains the result of a request for integer data. Data is valid when the
corresponding Request Done bit is set and all Request Error Bits are cleared. Interpretation is
dependent on which request was posted. See MC Control Word, N13:4,11,18.. (page 17), for
details.
External Outputs, N12:7,15,23..
Logical outputs in some MC³ controllers can be mapped to up to 16 external outputs. They
appear as bits in this word. External output 1 corresponds to bit 0 etc. This is useful when a
physical output is not needed at the MC location, but must be monitored by the PLC.
Integer Control File, N13
SuperBridge will maintain another PLC type integer file, with 7 integers per connected MC. The
purpose of this file is to make it possible for the PLC ladder or MMI programmer to control the
SuperBridge or MC operation. The file has read and write access. The file name is N13.
The following is a specification of the 7 words belonging to a certain MC.