sauter GW485LCD4P User manual

MODBUS – SLC gateway
user manual
Type: GW485LCD4P
Document version: 1.2

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
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Introduction
This device has been created because the CASE VAV software could monitor only one VAV
meanwhile this device is able to monitor 128 VAV. The read values could not be used in
building management system. But by this device there is a possibility to integrate the data of
the VAV into the building managing system via the Modbus Protocol.
The unit is powered with 15-32 VDC or 12-24 VAC.
Variable types
The type of the variables is the following:
– USINT: unsigned integer (0-65535)
– INT: integer (-32768 – 32767)
Modbus types
The Modbus type of the signals (types in the list below):
3 = Holding Register (Modbus function = 3 and 6)
4 = Input Register (Modbus function = 4)
Supported Modbus functions:
3 = Read Holding Register
4 = Read Input Register
6 = Write Single Register
Max 20 registers
Max 20 registers can be read in one message.

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
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Modbus communication
Modbus address can be 1-127.
Supported baud rate:
– 2400 bps
– 4800 bps
– 9600 bps
– 19200 bps
– 38400 bps
Stop bit: 1
Data bits: 8
Parity: None
Stop bit: 1

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
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Input register (Function code 4)
register data type description comment
30001 USINT Modbus address value is from 1 to 127
30002 USINT S C overrun counter
30003 USINT S C frame error counter
30004 USINT S C crc error counter
30005 USINT S C address error counter
30006 USINT Global no answer counter
30007 USINT Modbus overrun counter
30008 USINT Modbus frame error counter
30009 USINT Modbus crc error counter
30010 USINT VAV1 S C address value is up to 200, if 0, polling disable
3XXX1 INT VAVXXX Setpoint (%) scale factor 10
3XXX2 INT VAVXXX Actual value (%) scale factor 10
3XXX3 USINT VAVXXX Position (°) scale factor 10
3XXX4 INT VAVXXX Position (%) scale factor 10
3XXX5 INT VAVXXX Differential pressure (%) scale factor 10
3XXX6 INT VAVXXX Second setpoint (%) scale factor 10
3XXX7 INT VAVXXX Second actual value (%) scale factor 10
3XXX8 N/A Not used (read 0xFFFF (65535))
3XXX9 USINT VAVXXX No answer counter
XXX: 1-128 (MAX 128 VAV!)
30002, 30007: The receive FIFO buffer can hold two characters. An overrun error will be
generated if a third character, in its entirety, is received before the FIFO is accessed.
30003, 30008: A framing error indicates that a Stop bit was not seen at the expected time.
30005: The numbers of errors occur when a polled VAV does not answer, but another send
a response message.
30006: Total number of errors, which does not respond to the question. Equal to the sum of
the 6th element of the register arrays.
The input registers are reset to 0 after restart.

GW485LCD4P user manual (ver.: 1.0ß)
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Holding register (Function code 3)
register
data type description comment
40001 USINT Modbus address value is from 1 to 127
40002 USINT Modbus baud rate value is up to 4
40003 USINT Min. polling interval in second value is from 1 to 240
40004 USINT Global polled data kill bits value is up to 1 7
40005 USINT Display auto shift 0=Off, 1=ON
40006 USINT Display shift period 1- 50 cycle (1 cycle = 4 sec + sec with loop )
40007 USINT Display holding period 1- 50 cycle (1 cycle = 4 sec + sec with loop )
40008 USINT VAV comm. fault response 0=error message, 1= read 0xFFFF (65535)
40009 N/A Not used (read 0xFFFF (65535))
4XXX0 USINT VAVXXX S C address value is up to 200, if 0, polling is disable
4XXX1 USINT VAV1 second loop read settings 0=Off, 1=Pressure, =Temperature
4XXX2 USINT VAVXXX polled data kill bits If 40007 reg. is not 0, this value is ignored.
4XXX3 USINT VAVXXX manual command value is up to 7
4XXX4 USINT VAVXXX manual command value scale factor 10, value is up to 1100 (110.0 %/°)
4XXX5 N/A Not used (read 0xFFFF (65535))
4XXX6 N/A Not used (read 0xFFFF (65535))
4XXX7 N/A Not used (read 0xFFFF (65535))
4XXX8 N/A Not used (read 0xFFFF (65535))
4XXX9 N/A Not used (read 0xFFFF (65535))
XXX: 1-128 (MAX 128 VAV!)
40001: The Modbus address can be between 1 and 127. Default value is 1.
40002: Modbus baud rate might be:
0: 2400
1: 4800
2: 9600 (Default)
3: 19200
4: 38400
40003: Polling interval on SLC bus. Default value is 1 s.
40004: All of polled VAV data type can be disable. Default value is 0 (enable all polling).
– 1. bit: Disable setpoint polling (1)
– 2. bit: Disable actual value polling (2)
– 3. bit: Disable position in degrees polling (4)
– 4. bit: Disable position polling (8)
– 5. bit: Disable differential pressure polling (16)
– 6. bit: Disable second setpoint polling (32)
– 7. bit: Disable second actual value polling (64)
This number is valid for all register arrays. If the value is 0, then you can define for
each VAV.
For example you must monitor only VAV angle in degrees, then this value is 27
(1+2+8+16).

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
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40005: Enable or disable displayed VAV scrolling on LCD display.
40006: Scroll to next VAV after 1-250 cycle. (1 cycle without second loop display is 4 sec
with second loop display is 6 sec) (Default=2)
40007: If you choose a VAV to display with ‘SET’ button, with this value can you set that
you want to see through many cycle. (1 cycle without second loop display is 4 sec
with second loop display is 6 sec) (Default=15)
40008: If the VAV device does not send a response message, you will get 0xFFFF hex
(65535 dec) in register 3XXX1-3XXX7 with multiple read function.
With single read function (read only 1 register) you can select the Modbus response:
0: exception responses from Modbus (04 hex: slave device failure) (Default)
1: 0xFFFF hex (65535 dec)
4XXX1: VAV SLC address can be 0-200. If the value is 0, this ‘register array’ will be
disabled.
4XXX2: VAV second loop setting.
0: Second loop polling diable
1: Room pressure control loop polling and displaying
2: Room temperature control loop polling and displaying
4XXX3: You can set the VAV in manual operation with this register.
0: Manual operation is disabled (Default)
1: Stop working
2: Damper close
3: Damper open
4: Set the angle to defined position (4XXX9 register’s value with scale factor 10)
5: Set the air flow (setpoint) to defined value (4XXX9 register’s value with scale
factor 10)
6: Vmin
7: Vmax
8: Adapt working angle
After restart this value will be reset to 0.
4XXX4: This value is for angle or air flow with scale factor 10. After restart this value will be
reset to 0.
XXX = 1-128
The holding registers will be stored in EEPROM memory expects 4XXX8 and 4XXX9
registers.
THIS DEVICE HAS 4 SLC NETWORK!
Register arrays (XXX) mapped as fallow:
001-032: SLC network 1
033-064: SLC network 2
065-096: SLC network 3
097-128: SLC network 4

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
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Hardware overview
–LED’s functions
POWER: Power indicator LED (green)
TX1: VAV polling indicator (red)
RX1: VAV response indicator LED (green)
STATUS: Gateway status indicator LED (yellow), 1 second flash cycle as follows:
– 1/5 duty cycle: all of assigned VAV sends response
– 2x 1/5 duty cycle: you are in the settings menu
– 4/5 duty cycle: at least one VAV does not send response
TX2: Modbus response indicator LED (red)
RX2: Modbus polling indicator LED (green)

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
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–Connection:
This device is a ‘master’ on SLC network. The CASE VAV software is a ‘master’ too. You
can use only one ‘master’ on the VAV network.

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
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Display
Normal gateway operation:
– Start screens (after restart):
– If the device has not assigned VAV, you can see the follow:

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
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– When the device has assigned VAV, 2 displays changed every 2 seconds:
– You can change the displayed VAV with pushing ‘SET’ button:
– When the VAV is in manual operation, you can see a hand pictogram:
•Manual air flow, Vmin, Vmax:

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
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•Manual angle, stop, damper open, damper close:
Settings menu:
The device has a settings menu.
– Push the ‘Reset’ button and after restart hold the ‘SET’ button, then you can see the
follow:
– Release the ‘SET’ button, then short pressing this button can you change between
‘-YES-’ or ‘-NO-’. If you select ‘-YES-’, after 2 seconds the last releasing of the ‘SET’
button you must enter the password:
Wait until you press the ‘SET’ button.

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
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– When you push the button, the first number will be increased
– After 2 seconds the last releasing of the ‘SET’ button you can increase the second
number:
THE PASSWORD IS 5555.
– When the password is correct, you can see the settings:
Wait until you press the ‘SET’ button.
– You can select the follow:

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
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– SLC settings:
– Scan VAV devices:
If you select the ‘Start’:

GW485LCD4P user manual (ver.: 1.0ß)
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– Polling interval:
– Set new interval:
Push the ‘SET’ button to increase the value.
After 2 seconds the last releasing of the ‘SET’ button the interval will be stored.
– Modbus settings:
– Modbus address:

GW485LCD4P user manual (ver.: 1.0ß)
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– Set new address:
Push the ‘SET’ button to increase the value.
After 2 seconds the last releasing of the ‘SET’ button the address will be stored.
– Modbus baud rate:
– Set new baud rate:
Push the ‘SET’ button to increase the value.
After 2 seconds the last releasing of the ‘SET’ button the baud rate will be stored.

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
[email protected]r-bc.com •www.sauter.hu
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Use with nPO
Install communication driver:
1. Add new driver.
2. Select Modicon Modbus (VPIWNMR).
1.
2
.

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
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3. Add name.
4. Edit Init file.
BAUD_RATE = 9600
BUS=M,D
SWAP = NO
FLOATSWAP = NO
LONGADDR = NO
RTSCTS = NO
IFG = 0
IFG_MS = 0
1.
2
.
3
.

GW485LCD4P user manual (ver.: 1.0ß)
SAUTER Magyarország •Sauter Automatikai Kft. •1148 Budapest, Fogarasi út 2-6. •Tel. [phone] •Fax [phone]
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5. Select the gateway’s COM port.
6. Only “Finish”.
2
.
1
.

GW485LCD4P user manual (ver.: 1.0ß)
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7. You can use the communication driver after restart.

GW485LCD4P user manual (ver.: 1.0ß)
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Add new data point
The driver address structure:
01 4 001 0
MODBUS address
(1-99)
Function code
(3, or 4)
VAV register array (1-128)
(0 is a diagnostic array)
Array
element
VAV’s data point definition:
– 1st array, VAV SLC address (register array zero element):
This data point is both readable and writable. The value must be between 0 and 200 that
corresponds with the VAV’s SLC address. If the value is set to 0, so this array not will be
uploading.