TPU2000/2000R Modbus/Modbus Plus Automation Guide
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The transfer of registers to a block is accomplished by using equation 8 and providing a scale factor of 1. Thus
the contents of the source register are divided by 1 and transferred to the User Definable Register Table. It is
important that the scale type of 16 be use d to ensure the transfer is not scaled.
Relay Status (1 Register Defined)
Bit 0 shall update if the unit has failed Self Test. Bits 1 (Lsb) through Bit 4, Bit 9 and 10, shall update to a 1 if any
of the corresponding data to the bit group changes. The Bits shall reset when the register is polled by the host.
Bits 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11, update the status real time indicate the state of the bit defined
TPU2000/2000R relay feature.
If Bit 2 is enabled, then 6X register parameterization data has been changed through the front panel of the
TPU2000/2000R. In an automation application, a read of this register allows for quick determination of which data
to access for immediate display. The Bits are reset when read by the host. Table 5-12 lists the bit mapping for the
relay status register.
The Relay Status register is especially valuable in that if a TPU2000/2000R value has changed, it may be
determined via a read of Register 40129. Once the Relay Status register has been accessed by the host, all bits
in Register 40129 will be reset by the relay. The status shall then be refreshed by the TPU2000/2000R until the
next host read of Register 40129. Once the status change has been detected by the host, specific registers
further detailing the status change may be accessed by the host.
Table 5-12. Relay Status Modbus Address Map Definition
Register
Address
Item Description
40129 Relay
Status
Bit 0
Self Test (Lsb)
Bit 1
Contact Input Changed
Bit 2 Local Settings Changed
Bit 3 Remote Edit Disabled
Bit 4
Alternate Settings 1 Active
Bit 5
Alternate Settings 2 Active
Bit 6
New Fault Record
Bit 7
Control Power Cycled
Bit 8
New Operation Recorded
Bit 9
New Peak Demand Recorded
Bit 10 New Minimum Demand Value
Bit 11 Reserved
Bit 12 Reserved
Bit 13 Reserved
Bit 14 Reserved
Bit 15 Reserved (Msb)
Unsigned 16 bit
Self Test In Progress
Input Transitioned
Settings Changed
Edit Via Network Enabled
Alternate Setting Group 1 Enabled
Alternate Setting Group 2 Enabled
New Fault Record In Buffer
Unit Power Cycled
New Operation Record in Buffer
New Peak Demand In Buffer
New Minimum Demand In Bufferl
Application Example
. A Modbus Host is able to parse data in a bit format which it access through the network.
The host is required to monitor a TPU2000/2000R for new fault and event records. What command should be
sent to a TPU2000/2000R to gather the information.
Figures 5-33 and 5-34 illustrate data strings sent to the TPU2000/2000R to determine if a new event or operation
record has been stored.
