Network UPS Tools
Power Devices support

Hardware

UPS Connector

D-Sub-9 Female

Communication Interface Pins Assignment
Pin No. Signal Description

2

RXD

RS232 receive data (Output data from UPS to PC)

3

TXD

RS232 transmit data (Input data from PC to UPS)

4

DTR

+12Vdc

5

GND

Signal ground

6

BATT LOW

This pin triggers an active-low signal in battery low condition

8

BATT MODE

This pin triggers an active-low signal in UPS backup mode

1, 7, 9

UNUSED
RS232 Technical Specification Summary
Connector

9 pin, Type D, Female

Format

ASCII 8 bit, 1 start bit, 1 stop bit

Baud Rate

1200 bps

Parity

None

Duplex

Full

Message Format

<Header 1 byte><Message Type 1 byte><Data Length 3 bytes><Data 128bytes max>

Where:

Header

is a ^ (carat) character

Message Type

will be one of the following:

0

Command rejected (from UPS to PC)

1

Command accepted (from UPS to PC)

P

Poll command (from PC to UPS)

S

Set command (from PC to UPS)

D

Data returned (from UPS to PC)

Data Length

is the number of bytes of data passed

Data

is comma delimited. If a variable value is unavailable, a comma with no data is placed in the variable location.

For example, if only the 2nd, 4th, and 6th variables have valid data, the UPS response will have the following format:

^D010,1,,22,,82

Poll Commands

Command Description Max Data Length Variables Returned

MAN

UPS manufacturer

32

Manufacturer

MOD

UPS model

64

UPS model

ST1

Status group 1 - Battery

32

,Battery status ,,,, Estimated charge

ST2

Status group 2 - Input

65

,Input num lines, Input frequency 1, Input voltage 1

ST3

Status group 3 - Output

66

Output source, Output frequency, Output num lines, Output voltage 1,,,Output load1

VER

UPS version

32

UPS firmware and/or software version

UPS Status

ST1 command will return up to 32 bytes of data (including commas). All values are comma delimited.

Variable Name Max Length Units

Battery status

1

  • 0 → Battery ok

  • 1 → Battery Low

  • 2 → Battery Depleted

Estimated Charge

3

Percent

ST2 command will return up to 65 bytes of data (including commas). All values are comma delimited.

Variable Name Max Length Units

Input num lines

1

Integer (1-3)

Input frequency 1

3

0.1 Hz

Input voltage 1

4

0.1 volts

ST3 command will return up to 66 bytes of data (including commas). All values are delimited.

Variable Name Max Length Units

Output source

1

  • 0 → Normal

  • 1 → On battery

  • 2 → On bypass

  • 3 → Reducing

  • 4 → Boosting

  • 5 → Other

Output frequency

3

0.1 Hz

Output num lines

1

Integer (1-3)

Output voltage 1

4

0.1 volts

Output load 1

3

Percent

Set Commands

Command Description Max Length Data Variable Set

PSD

Performs UPS shutdown after the indicated no. of seconds

7

  • -1 → Abort

  • 0 → Immediate

  • >0 → seconds until shutdown

Shutdown After Delay

RWD

Immediately perform UPS shutdown, then restarts after indicated no. of seconds

7

Seconds

Reboot with Duration

STD

Starts UPS after indicated no. of seconds

7

  • -1 → Abort

  • 0 → Immediate

  • >0 → seconds until startup

Startup After Delay

TST

Test UPS

2

  • -1 → Abort test

  • 0 → No effect

  • 1 → General test

Test Type

Communication Examples

  1. Host PC requests for UPS manufacturer: 

    ^P003MAN

    UPS responds:

    ^D014PK ELECTRONICS
    014

    14 bytes to follow

    PK ELECTRONICS

    Manufacturer

  2. Host PC requests for UPS model: 

    ^P003MOD

    UPS responds:

    ^D006US9003
    006

    6 bytes to follow

    US9003

    Model

  3. Host PC requests for UPS status input parameters: 

    ^P003ST2

    UPS responds:

    ^D011,1,500,2350
    011

    11 bytes to follow

    1

    Input num lines (single phase UPS)

    500

    Input frequency 1 of 50.0 Hz

    2350

    Input voltage 1 of 235.0 Volts

  4. Host PC attempts to shutdown UPS: 

    ^S006PSD120
    006

    6 bytes to follow

    PSD120

    Shutdown UPS in 2 minutes

    UPS responds:

    ^1
    1

    Command accepted

  5. Host PC attempts to reboot UPS: 

    ^S006RWD300
    006

    6 bytes to follow

    RWD300

    Shutdown UPS immediately and restarts it after 5 minutes

    UPS responds:

    ^1
    1

    Command accepted