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1MRS750881-MUM
11.
11.1.
11.2.
11.2.1.
11.2.2.
Remote Monitoring and Control Unit
Technical Reference Manual
Revision history of REC 523
Revision identification
The main releases of REC 523 are differentiated with the software revision letter in
the order number of the device printed on the marking strip on the front panel of
REC 523, for example as follows:
Order No: REC523F 033AAA
The revisions of REC 523 are presented in Table 11.1.-1.
Table 11.1.-1 REC 523 software revisions
Revision
A
B
C
D
E
F
a. Includes the same function blocks as Release Q4/98.
The revision letter determines the main release which may involve functional
additions and changes to the product. The changes included in each revision
compared to the previous one are described in more detail below.
Changes and additions to earlier released revisions
Release Q1/99
General
• Software revision B (release 1.5)
Protocols and communication
• New protocols:
IEC 60870-5-101 (unbalanced mode)
DNP 3.0
• ANSI X.3.28 HD not included
Hardware and mechanics
• Revision of the CPU card
Release Q2/99
General
• Software revision C
• Revision (E) of the disturbance recorder function block MEDREC16
• New features:
• LED test
Release
Q4/98
a
Q1/99
Q2/99
Q4/00
Q1/04
Q1/05
REC 523
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