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C
Modbus
™
RTU Communications Protocol
SIMPRO-100
164
PRIM-2400C
C.9
07h Read Exception
Status Command
The SIMPRO-100 Relay uses this function to
allow a Modbus master to read the present status
of the relay and protected motor.
Table C.11
07h Read Exception Status Command
If the bit is set (1), the output contact is asserted
or the motor is in the indicated condition. If the bit
is cleared (0), the output contact is deasserted or
the motor is not in the indicated condition. In the
event that both Bits 6 and 7 are cleared, the
motor is starting.
C.10
08h Loopback
Diagnostic
Command
The SIMPRO-100 Relay uses this function to
allow a Modbus master to perform a diagnostic
test on the Modbus communications channel and
relay. When the subfunction field is 0000h, the
relay returns a replica of the received message.
Table C.12
08h Loopback Diagnostic Command
Bytes
Field
The Master Request must have the Following Format
1 byte
Slave address
1 byte
Function code (07h)
0 bytes
No data fields are sent
2 bytes
CRC-16 for message
A Successful SIMPRO-100 Relay Response will have
the Following Format
1 byte
Slave address
1 byte
Function code (07h)
1 byte
Status byte
2 bytes
CRC-16 for message
The Status Byte is Sent LSB-First, and Consists of the
Following Bits
Bit 0
Trip Output Status
Bit 1
OUT1 Output Status
Bit 2
OUT2 Output Status
Bit 3
OUT3 Output Status
Bit 4
ALARM Output Status
Bit 5
0
Bit 6
Motor Stopped
Bit 7
Motor Running
Bytes
Field
The Master Request must have the Following Format
1 byte
Slave address
1 byte
Function code (08h)
2 bytes
Subfunction (0000h)
n bytes
Data fields (n must be an even number)
2 bytes
CRC-16 for message
A Successful SIMPRO-100 Relay Response will have
the Following Format
1 byte
Slave address
1 byte
Function code (08h)
2 bytes
Subfunction (0000h)
n bytes
Data fields (identical to data in Master request)
2 bytes
CRC-16 for message
Summary of Contents for SIMPRO-100
Page 1: ...SIMPRO 100 Motor Protection Relay Instruction Manual Document No PRIM 2400C ...
Page 12: ...Contents SIMPRO 100 x PRIM 2400C ...
Page 16: ...Contents SIMPRO 100 xiv PRIM 2400C ...
Page 42: ...3 SIMPRO PC Software SIMPRO 100 40 PRIM 2400C ...
Page 100: ...6 ASCII Serial Port Operation SIMPRO 100 98 PRIM 2400C ...
Page 127: ...SIMPRO 100 Event Analysis 9 PRIM 2400C 125 Figure 9 2 Example SER Report ...
Page 136: ...10 Maintenance Troubleshooting SIMPRO 100 134 PRIM 2400C ...
Page 138: ...A Firmware Versions SIMPRO 100 136 PRIM 2400C ...
Page 206: ...D SIMPRO PC Compatibility Features SIMPRO 100 204 PRIM 2400C ...
Page 214: ...E Motor Thermal Element SIMPRO 100 212 PRIM 2400C ...
Page 230: ...F SIMPRO 100 Relay Settings Sheets SIMPRO 100 228 PRIM 2400C ...
Page 239: ......