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PSH150 user manual rev4 Page 11/15
3.6 Modbus Interface
PSH150 supports Modbus RTU over RS-485 line or USB (Virtual com port). The following Modbus
table is implemented:
Name Address
Hex (dec) Modbus type Function
code Description
Modbus settings (loaded on next startup)
Address 0x1000 (4096) Hold register 3,4,6,16 Range 1..247
Baudrate 0x1001 (4097) Hold register 3,4,6,16 1: 4800
2: 9600
3: 19200
4: 38400
Parity 0x1002 (4098) Hold register 3,4,6,16 1: None
2: Even
3: Odd
Stop bits 0x1003 (4099) Hold register 3,4,6,16 1: 1 stop bits
2: 2 stop bits
Device settings
Output voltage 0x1010 (4112) Hold register 3,4,6,16
Inhibit polarity 0x1011 (4113) Hold register 3,4,6,16
Operating mode 0x1012 (4114) Hold register 3,4,6,16
Display mode 0x1013 (4115) Hold register 3,4,6,16 1: Automatic
2: Voltage
3: Current
4: Power
Output enable 0x1014 (4116) Hold register 3,4,6,16 0: Disabled
1: Enabled
Auxiliary output
enable 0x1015 (4117) Hold register 3,4,6,16 0: Disabled
1: Enabled
Metering
Output voltage 0x2000 (8192) Input register 3,4 Measured output voltage
Output current 0x2001 (8193) Input register 3,4 Measured output current
Output power 0x2002 (8194) Input register 3,4 Measured output power
Auxiliary voltage 0x2003 (8195) Input register 3,4 Measured auxiliary voltage
Internal
temperature 0x2004 (8196) Input register 3,4 Measured internal temperature
State
DC OK 0x4000 (16384) Discrete input 1,2 Measured output voltage is >90% of the
set point
Output short
circuit 0x4001 (16385) Discrete input 1,2 A short circuit is present on the output
Auxiliary overload 0x4002 (16386) Discrete input 1,2 Auxiliary output is overloaded
Inhibit signal 0x4003 (16387) Discrete input 1,2 Status of the inhibit signal
USB powered 0x4004 (16388) Discrete input 1,2 Device is powered by USB only
Over temperature
warning 0x4005 (16389) Discrete input 1,2 Device internal temperature is high
Over temperature
error 0x4006 (16390) Discrete input 1,2 Device internal temperature is too high,
the output is disabled
Internal error 0x4007 (16391) Discrete input 1,2 An internal error occurred, the output is
disabled
Output disabled 0x4008 (16392) Discrete input 1,2 Output is disabled in settings.
Auxiliary output
disabled 0x4009 (16393) Discrete input 1,2 Auxiliary is disabled in settings.