SIELCO SISTEM SS 8014 User Manual

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SS 8014

SS 8014

Modbus TCP/IP server

4 isolated channels for

RTD, Resistance and

Potentiometer input

User Guide – MODBUS TCP/IP protocol

User Guide – MODBUS TCP/IP protocol

Firmware Version : 8300

Firmware Version : 8300

NOTES:

Registers and coils marked as RO in the column 'Access' are Read Only registers.
Registers and coils marked as R/W in the column 'Access' are Read and Write registers.
For the devices of SS8000 series, the group of data 0xxxx is the mirror of the group 1xxxx, the group of data 3xxxx is the mirror of the group 4xxxx,
therefore the first register could be addressed either as 30002 (with function 04) or 40002 ( with function 03).

The maximum number of coils that can be read through Modbus functions 01 and 02 (see "Supported modbus functions codes") are: 128
The maximum number of registers that can be read through Modbus functions 03 and 04 (see "Supported modbus functions codes") are: 64
The maximum number of registers that can be written by Modbus function 16 (see "Supported modbus functions codes") are: 64
The maximum number of coils that can be written by Modbus function 15 (see "Supported modbus functions codes") are: 64

All of the data shared by a device communicating by Modbus TCP/IP protocol are mapped in tables, at each data is associated a proper address.
Each data can be of two types:

- “REGISTER”, data of 2 bytes size (word of 16 bits) that can be associated to analogue input or output, variables, set-point, etc...

- “COIL”, data of 1 single bit that can be associated to digital input or output or to a logic state.
A register could contain the image (mirror) of more coils; in example the 16 digital inputs of a device could be read or written as bit (singularly)
addressing the coil related to each input or can be read or written as a single word addressing the associated register wherein each bit corresponds to
a coil.
In the Modbus protocol, registers and coils are divided as per the following groups of addresses:
0xxxx and 1xxxx = Coils (bit)
3xxxx and 4xxxx = Registers (word)
When reading functions are performed, use the tables indicated below to address the registers .
It is possible to access to the internal registers of the device by direct command Modbus TCP/IP or by the integrated web server.

Function

01
02
03
04
05

06
15 (0F)
16 (10)

Description

Read Coil Status (0xxxx)
Read Inputs Status (1xxxx)
Read Holding Registers (4xxxx)
Read Inputs Registers (3xxxx)
Force Single Coil
Preset Single Register
Force Multiple Coil
Preset Multiple Registers

pag 1/4

(*)Coil (Hex)

0x00A1
0x00A2
0x00A3

Description

Watch-dog Enable
Watch-dog Event
Power-Up Event

Access

R/W
R/W
R/W

(*)Coil (Dec)

00161
00162
00163

PRELIMINARY DESCRIPTION

PRELIMINARY DESCRIPTION

REGISTERS TABLE

REGISTERS TABLE

COILS TABLE

COILS TABLE

SUPPORTED MODBUS FUNCTION CODES

SUPPORTED MODBUS FUNCTION CODES

Register
Position

40002
40003
40004
40005
40007
40011
40013
40031
40032
40033
40034
40036
40041
40042
40043
40044

Description

Firmware [0]
Firmware [1]
Name [0]
Name [1]
Node ID
System Flags
Watchdog timer
Input type Ch 0
Input type Ch 1
Input type Ch 2
Input type Ch 3
Break status
Analog Input (0) - Ch0
Analog Input (1) - Ch1
Analog Input (2) - Ch2
Analog Input (3) - Ch3

Access

RO

RO
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W

RO

RO

RO

RO

RO

40004 / 40005 : NAME

Field of 2 read/write registers (4 bytes or 4 ASCII characters) available for the user, it can contain the name of the device or an abbreviation that
identifies its function inside the plant. Each one of the 4 bytes could be written by values from 0 to 255, ASCII characters included.
The default value of this field contains the identifier of the device expressed in ASCII characters.

- Default value: “8014” (ASCII).

40002 / 40003 : FIRMWARE

Field of 2 read only registers ; contains the firmware identifier provided by the manufactured.

- Default value: 8300 (hex)

DESCRIPTION MODBUS REGISTERS

DESCRIPTION MODBUS REGISTERS

40011 : SYSTEM FLAGS

Contains the enable bits and system events of the device. The following parameters are configurable:

Watchdog Event Enable: this bit allows to enable the Watchdog Event (0 = W atchdog disabled, 1 = Watchdog enabled). If this bit is active and the
device doesn't receive commands for the time specified in the register 40013 “Watchdog timer”, the PWR green led blinks.
If this function is required must be implemented at the power-on of the device; the bit must be reset manually when the Watchdog event is occurred.

Watchdog Event: if this bit is set as 1 indicates that the Watchdog condition has happened (0 = Normal condition; 1 = alarm condition)
PowerUp Event: this bit is forced to 1 at each power on and indicates that the device has been switched off or reset. With the setting of this bit as 0

and checking its state, it is possible to know if a reset of the device has occurred (0 = reset not occurred; 1 = reset occurred).
This bit must be reset manually.

40013 : WATCHDOG TIMER

Contains the value of the WatchDog timer, expressed in step of 1 second. If the WatchDog is enabled and the device doesn't receive commands in
a time lower or equal to the value of the one expressed in this register the W atchDog will be activated (see description register ”System Flags”).

- Default value: 10 (10 sec.)

40031: INPUT TYPE Ch 0

This register shows the input type that is configured in relation to the type of sensor connected. The
table beside shows the types of sensors that can be connected to the input with the corresponding
value to write on the low part of register for the configuration of the input type.

- Default: Pt100 (0D Hex)

Bit

Descr.

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Input type #0

40032: INPUT TYPE Ch 1

This register shows the input type that is configured in relation to the type of sensor connected. The
table beside shows the types of sensors that can be connected to the input with the corresponding
value to write on the low part of register for the configuration of the input type.

- Default: Pt100 (0D Hex)

Bit

Descr.

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Input type #1

40033: INPUT TYPE Ch 2

This register shows the input type that is configured in relation to the type of sensor connected. The
table beside shows the types of sensors that can be connected to the input with the corresponding value
to write on the low part of register for the configuration of the input type.

- Default: Pt100 (0D Hex)

Bit

Descr.

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Input type #2

40034: INPUT TYPE Ch 3

This register shows the input type that is configured in relation to the type of sensor connected. The table beside shows
the types of sensors that can be connected to the input with the corresponding value to write on the low part of register
for the configuration of the input type.

- Default: Pt100 (0D Hex)

Bit

Descr.

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Input type #3

Value Type

00h Disabled
12h Res 0÷2000 Ohm
0Ch Res 0÷500 Ohm
0Dh Pt100
0Fh Ni100
0Eh Pt1000
10h Ni1000
11h Pot.< 500Ohm

Value Type

00h Disabled
12h Res 0÷2000 Ohm
0Ch Res 0÷500 Ohm
0Dh Pt100
0Fh Ni100
0Eh Pt1000
10h Ni1000
11h Pot.< 500Ohm

Value Type

00h Disabled
12h Res 0÷2000 Ohm
0Ch Res 0÷500 Ohm
0Dh Pt100
0Fh Ni100
0Eh Pt1000
10h Ni1000
11h Pot.< 500Ohm

Value Type

00h Disabled
12h Res 0÷2000 Ohm
0Ch Res 0÷500 Ohm
0Dh Pt100
0Fh Ni100
0Eh Pt1000
10h Ni1000
11h Pot.< 500Ohm

pag 2/4

Bit

Coil

Descr

15-14-13-12-11-10

163091620816107-06-05-04-03-02-01-00-

Watchdog Event enabling

Watchdog Event

Power-up Event

40007 : NODE ID

Contains the MODBUS address of the device; the values allowed are from 1 to 245 decimal.
This data is necessary for the correct addressing of the device into the Modbus net and must follow the IP address.

- Default value: Dec: 1, Hex: 01 INIT: Dec 245, Hex : F5.