7.59
Date Code 20170927 Instruction Manual SEL-751 Relay
Communications
Communications Protocols
CFG.XML File (Read-Only). Present only in units with the Ethernet
option, the CFG.XML file is supplementary to the CFG.TXT file. The
CFG.XML file describes the IED configuration and any options such as the
Ethernet port, and includes firmware identification, settings class names, and
configuration file information.
ERR.TXT (Read-Only) and SET_61850.CID File. Present if ordered with
the IEC 61850 protocol option. The ERR.TXT file contents is based on the
most recent SET_61850.CID file written to the relay. If there were no errors,
the file is empty. If errors occurred, the relay logs these errors in the ERR.TXT
file. The SET_61850.CID file contains the IEC 61850 configured IED
description in XML.
ACSELERATOR Architect SEL-5032 Software generates
and then downloads this file to the relay. See Appendix F: IEC 61850
Communications for more information.
Settings Directory (Only Available for FTP)
You can access the relay settings through files in the SETTINGS directory. We
recommend that you use support software to access the settings files, rather
than directly accessing them via other means. External settings support
software reads settings from all of these files to perform its functions. The
relay only allows you to write to the individual SET_cn files, where c is the
settings class code and n is the settings instance. Except for the SET_61850
CID file, changing settings with external support software involves the
following steps:
Step 1. The PC software reads the CFG.TXT and SET_ALL.TXT files
from the relay.
Step 2. You modify the settings at the PC. For each settings class that
you modify, the software sends a SET_cn.TXT file to the relay.
Step 3. The PC software reads the ERR.TXT file. If it is not empty, the
relay detects errors in the SET_cn.TXT file.
Step 4. For any detected errors, modify the settings and send the
settings until the relay accepts your settings.
Step 5. Repeat Step 2-Step 4 for each settings class that you want to
modify.
Step 6. Test and commission the relay.
SET_ALL.TXT File (Read-Only). The SET_ALL.TXT file contains the
settings for all of the settings classes in the relay. Calibration settings are
included only when the file is read at Access Level C.
SET_cn.TXT Files (Read and Write). There is a file for each instance of
each setting class. Table 7.57 summarizes the settings files. The settings class
is designated by c, and the settings instance number is designated by n.
M,"Modbus User Map"
R,"Report"
F,"Front Panel"
D1,"DNP Map 1 Settings"
D2,"DNP Map 2 Settings"
D3,"DNP Map 3 Settings"
I,"IEC 60870-5-103 Map"
Figure 7.33 CFG.TXT File (Sheet 2 of 2)
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