Data in the Modbus registers
1-7
SIPROTEC Modbus - Bus mapping 7UM62
C53000-L1840-C009-03
1.3 Notes to SIPROTEC objects
1.3.1 Changing the setting group
• In order to change the setting group, the value "1" = ON must be transmitted to the
corresponding register.
• Switching ON one setting group automatically switches OFF the current active set-
ting group.
• Transmission of the value "0" = OFF is insignificant for the change of the setting
group and is refused by the device.
• A change of the setting group is only possible via Modbus if the parameter Change
to Another Setting Group (parameter address = 302) has the value
Protocol.
References Standard mapping 3-1: ref. to chap. 2.1.1
Standard mapping 3-2: ref. to chap. 3.1.1
1.3.2 Cooling medium temperature
• The cooling medium temperature is transferred in per cent (%) to the 7UM62.
The protection device must be informed about the 100 % corresponding tempera-
ture using parameter 49 Temperature for Scaling (function 49 Thermal
Overload, parameter address = 1608).
• The temperature value via Modbus is only taken into account and shown at the
SIPROTEC device if the parameter 49 Temperature Input (function 49
Thermal Overload, parameter address = 1607) has the value Fieldbus.
• Unlike measured values in input direction, the identification "Overflow" or "Invalid"
is not indicated with the value -32768 (ref. to manual "SIPROTEC Communication
module, Modbus - Communication profile").
If an evaluation of the measurement status of the cooling medium temperature is
required then the indication “>Fail.Temp.inp” (>49 Failure temperature input,
internal object no. = 1508), routed to “Destination system interface” in the DIGSI
Configuration matrix, has to be used for this separately.
References Standard mapping 3-1: ref. to chap. 2.4.5
Standard mapping 3-2: ref. to chap. 3.4.5
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