D-12 F650 DIGITAL BAY CONTROLLER GEK-106310-AF
D.6 IEC 60870-5-104 INTEROPERABILITY APPENDIX D: IEC 60870-5-104 PROTOCOL
Physical layer
(network-specific parameter, all interfaces and data rates that are used are to be marked "X")
Transmission speed (control direction)
Unbalanced interchange Unbalanced interchange Balanced interchange
Circuit V.24/V.28 Circuit V.24/V.28 Circuit X.24/X.27
StandardRecommended if >1 200 bit/s
Transmission speed (monitor direction)
Unbalanced interchange Unbalanced interchange Balanced interchange
Circuit V.24/V.28 Circuit V.24/V.28 Circuit X.24/X.27
StandardRecommended if >1 200 bit/s
Link layer
(network-specific parameter, all options that are used are to be marked “X”. Specify the maximum frame length. If a non-
standard assignment of class 2 messages is implemented for unbalanced transmission, indicate the Type ID and COT of all
messages assigned to class 2.)
Frame format FT 1.2, single character 1 and the fixed time out interval are used exclusively in this companion
standard.
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