P92x/EN CT/E11 Technical Guide
Modbus Protocol
Page 56/118 MiCOM P921-P922-P923
PRODUCTS
CODE DESCRIPTION
P921 P922 P923
Unsigned integer : Configuration of the
under/overvoltage thresholds
XXX
0 : Disabled
1 : "OR" detection
F55
2 : "AND" detection
Unsigned integer : Configuration of the frequency
thresholds
XX
0 : Disabled
1 : Underfrequency
F56
2 : Overfrequency
F57 Unsigned integer : trigger mode of the frequency
disturbance record
0 : start of a time delayed df/dt information
1 : activation of a logic equation
2 : closing of the tripping relay contact ( RL1 )
X
F58 Unsigned integer : information generated by the
rate of change of frequency function
Bit 0 : df/dt1 instantaneous information
Bit 1 : df/dt2 instantaneous information
Bit 2 : df/dt3 instantaneous information
Bit 3 : df/dt4 instantaneous information
Bit 4 : df/dt5 instantaneous information
Bit 5 : df/dt6 instantaneous information
X
F59 Unsigned integer : selection of the Date format
0 : Private date format
1 : Date Format IEC
XX
F60 Unsigned integer : Selection of the working mode
for changing the active group:
0 : the user chooses to work on EDGE of a logic
input; either with a control command, or by using
the front face of the relay.
1 : the user chooses to work on LEVEL of a logic
input.
XX
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