Seneca Z-8TC-SI User manual

ORIGINAL INSTRUCTIONS
USER MANUAL
Z-8TC-SI
Z-8TC-SI-LAB
8-CHANNEL 24BIT ADC THERMOCOUPLE CONVERTER
SENECA S.r.l.
Via Austria 26 –35127 –Z.I. - PADOVA (PD) - ITALY
Tel. [phone] Fax [phone]
www.seneca.it

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The content of this documentation refers to products and technologies described in it.
All technical data contained in the document may be changed without notice.
The content of this documentation is subject to periodic review.
To use the product safely and effectively, read the following instructions carefully before use.
The product must be used only for the use for which it was designed and manufactured: any other use is under
the full responsibility of the user.
Installation, programming and set-up are allowed only to authorized, physically and intellectually suitable
operators.
Set-up must be performed only after correct installation and the user must follow all the operations described in
the installation manual carefully.
Seneca is not responsible for failures, breakages and accidents caused by ignorance or failure to apply the
stated requirements.
Seneca is not responsible for any unauthorized modifications.
Seneca reserves the right to modify the device, for any commercial or construction requirement, without the
obligation to promptly update the reference manuals.
No liability for the contents of this document can be accepted.
Use the concepts, examples and other content at your own risk.
There may be errors and inaccuracies in this document that could damage your system, so proceed with caution,
the author(s) will not take responsibility for it.
Technical specifications are subject to change without notice.
CONTACT US
Technical support
[email protected]
Product information
[email protected]
This document is the property of SENECA srl.
Copies and reproduction are prohibited unless authorised

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Document revisions
DATE
REVISION
NOTES
AUTHOR
12/10/2022
0
First revision
MM
19/12/2022
1
Summary fix
MM
20/12/2022
2
Modbus Register Fix
MM

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TABLE OF CONTENTS
INTRODUCTION...........................................................................................................6
DESCRIPTION ..........................................................................................................6
TYPE OF SUPPORTED THERMOCOUPLE ................................................................7
MEASUREMENT OF THE COLD JUNCTION..............................................................7
RESPONSE MEASURES AND TIMES ........................................................................8
SAMPLING TIMES AND MEASUREMENT UPDATE TIME.....................................8
FILTER ......................................................................................................................8
MODBUS RESPONSE TIME.....................................................................................8
DEVICE CONFIGURATION..........................................................................................8
USB CONNECTION AND CONFIGURATION RESET.................................................9
FIRMWARE UPDATE...................................................................................................9
MODBUS COMMUNICATION PROTOCOL...............................................................10
SUPPORTED MODBUS FUNCTION CODES.........................................................10
MODBUS REGISTER TABLE....................................................................................11
NUMBERING OF "0-BASED" OR "1-BASED” MODBUS ADDRESSES ..............11
NUMBERING OF MODBUS ADDRESSES WITH "0-BASED" CONVENTION......11
NUMBERING OF MODBUS ADDRESSES WITH "1 BASED" CONVENTION
(STANDARD) ....................................................................................................................12
BIT CONVENTION WITHIN A MODBUS HOLDING REGISTER ...........................13

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MSB AND LSB BYTE CONVENTION WITHIN A MODBUS HOLDING REGISTER
13
REPRESENTATION OF A 32-BIT VALUE IN TWO CONSECUTIVE MODBUS
HOLDING REGISTERS.....................................................................................................14
TYPE OF 32-BIT FLOATING POINT DATA (IEEE 754).........................................14
Z-8TC-SI: MODBUS 4X HOLDING REGISTERS TABLE (FUNCTION CODE 3)...16

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INTRODUCTION
ATTENTION!
This user manual extends the information from the installation manual to the configuration of the
device. Use the installation manual for more information.
ATTENTION!
In any case, SENECA s.r.l. or its suppliers will not be responsible for the loss of data/revenue or
consequential or incidental damages due to negligence or bad/improper management of the device,
even if SENECA is well aware of these possible damages.
SENECA, its subsidiaries, affiliates, group companies, suppliers and distributors do not guarantee that
the functions fully meet the customer's expectations or that the device, firmware and software should
have no errors or operate continuously.
DESCRIPTION
Z-8TC-SI is a thermocouple converter with 8 independent and isolated measurement channels equipped with
an analogue-digital converter with a 24-bit resolution.
The insulation relates to both the power supply and the RS485 communication port.
The device measures the value of the thermocouples and makes them available through the RS485 port using
the Modbus RTU protocol.
The device is able to detect the sensor burnout.
ATTENTION!
Even at constant room temperature, the declared accuracies are achieved after at least 30 minutes
from switching on the device.

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TYPE OF SUPPORTED THERMOCOUPLE
The supported sensors are:
SENSOR
STANDARD
MEASURING
RANGE
J
EN 60584-1:1997
-210 ÷ +1200°C
K
EN 60584-1:1997
-200 ÷ +1372°C
R
EN 60584-1:1997
-50 ÷ +1768°C
S
EN 60584-1:1997
-50 ÷ +1768°C
T
EN 60584-1:1997
-200 ÷ +400°C
B
EN 60584-1:1997
+250 ÷ +1820°C
E
EN 60584-1:1997
-200 ÷ +1000°C
N
EN 60584-1:1997
-200 ÷ +1300°C
L
Gost 8.585-2001
-200 ÷ +800°C
Each channel is independent, therefore it is also possible to use different sensors in the 8 channels.
MEASUREMENT OF THE COLD JUNCTION
The measurement of the cold junction is carried out with 4 sensors positioned near the 4 measurement terminals.
It is possible to activate or not the cold junction correction so that the measurement can also be corrected with
any external equipment.
ATTENTION!
It is necessary to adjust the cold junction compensation for each channel using the offset
parameter.
The internal cold junction compensation uses a sensor whose distance from the terminal varies in
each channel, the use of this function can, therefore, lead to differences between the measured
values of the channels.

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RESPONSE MEASURES AND TIMES
SAMPLING TIMES AND MEASUREMENT UPDATE TIME
Sampling time is configurable from 25ms to 400ms per channel, in particular:
CHANNEL SAMPLING TIME
25 ms
50 ms
100 ms
200 ms
400 ms
To calculate the update time of a channel, consider the following example:
By activating 8 channels and setting a sampling time of 25 ms on all of them, you get an update of the
measurements on channel 1 every: 25*8 = 200 ms.
FILTER
To each channel it is possible to insert a low pass filter to stabilize the measurement, it is a 10-sample moving
average filter.
MODBUS RESPONSE TIME
Modbus Response Time: 5 ms (typical)
DEVICE CONFIGURATION
The device can be configured using the Easy Setup or Easy Setup 2 software, configurations are as follows:
SENSOR TYPE: allows you to select the type of sensor connected to the channel, it is also possible to
disconnect the channel if it is not used.
IF CHARGE FAILURE: Allows you to replace (or not) the measured value with a temperature/mV safety value
set by the user in the event of a fault. The failure can be caused by:
1) Sensor beyond measurement values
2) Sensor burnout
SAFETY VALUE It is the value that is displayed in case of fail.
COLD JUNCTION COMPENSATION: Activates or not the internal compensation of the cold junction.
FILTERING: Allows you to activate the filter on the selected channel, filtering allows you to obtain a slower but
stable measurement.
CHANNEL SPEED: Allows you to set the channel sampling time
TERMINAL CONFIGURATION: Allows you to choose the configuration of the measurement terminals according
to the Z-8TC-SI or Z-8TC-SI-LAB model.
INTERPRETATION OF FLOATING POINTS: Allows you to set whether the single precision (32 bit) Floating
Point registers are to be interpreted with the most significant value on the high word or on the low word.

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CHANNEL OFFSET Allows you to set the measurement offset value.
USB CONNECTION AND CONFIGURATION RESET
The front USB port allows a simple connection to configure the device via the configuration software.
If it is necessary to restore the instrument factory configuration, use the configuration software.
FIRMWARE UPDATE
Through the USB port it is possible to update the firmware.
To update the firmware:
1) Disconnect the device from the power supply;
2) Turn dip switch 9 to ON.
3) Now the device is in "firmware update" mode (the TX led stays on), connect the USB cable to the PC
4) Power up the device
5) The device will be displayed in the PC as an "RP1-RP2” external unit
6) Copy the new firmware (uf2 extension) to the root of the "RP1-RP2” unit
Once the firmware file has been copied, the device will automatically reboot
7) Remove power from the device
8) Turn dip switch 9 to OFF, the device is now in “normal operation” mode.
9) Power up the device
10) It is possible to check that the fw update was successful by connecting the device to the Easy Setup
software, the firmware revision is shown in the bottom left:

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MODBUS COMMUNICATION PROTOCOL
The supported communication protocol is:
▪Modbus RTU Slave (from both the RS485 and USB ports)
For more information on these protocols, see the website:
http://www.modbus.org/specs.php.
SUPPORTED MODBUS FUNCTION CODES
The following Modbus functions are supported:
▪Read Holding Register (function 3)
▪Write Single Register (function 6)
▪Write Multiple registers (function 16)
ATTENTION!
All 32-bit values are contained in 2 consecutive registers
ATTENTION!
All 64-bit values are contained in 4 consecutive registers
ATTENTION!
Any registers with RW* (in flash memory) can be written up to about 10000 times
The programmer must make sure the PLC/Master Modbus does not exceed this limit

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MODBUS REGISTER TABLE
The following abbreviations are used in the register tables:
MS
Most Significant
LS
Least Significant
MSBIT
Most Significant Bit
LSBIT
Least Significant Bit
MMSW
“Most” Most Significant Word (16bit)
MSW
Most Significant Word (16bit)
LSW
Least Significant Word (16bit)
LLSW
“Least” Least Significant Word (16bit)
RO
Read Only
RW*
Read-Write: REGISTERS CONTAINED IN FLASH MEMORY: WRITABLE ABOUT
10,000 TIMES MAXIMUM
UNSIGNED 16 BIT
Unsigned integer register that can assume values from 0 to 65535
SIGNED 16 BIT
Signed integer register that can take values from -32768 to +32767
UNSIGNED 32 BIT
Unsigned integer register that can assume values from 0 to 4294967296
SIGNED 32 BIT
Signed integer register that can take values from -2147483648 to 2147483647
UNSIGNED 64 BIT
Unsigned integer register that can assume values from 0 to 18446744073709551615
SIGNED 64 BIT
Signed integer register that can assume values from -2^63 to 2^63-1
FLOAT 32 BIT
32-bit, single-precision floating-point register (IEEE 754)
https://en.wikipedia.org/wiki/IEEE_754
BIT
Boolean register, which can take the values 0 (false) or 1 (true)
NUMBERING OF "0-BASED" OR "1-BASED” MODBUS ADDRESSES
According to the Modbus standard the Holding Registers are addressable from 0 to 65535, there are 2 different
conventions for numbering the addresses: "0-BASED" and "1-BASED".
For greater clarity, Seneca shows its register tables in both conventions.
ATTENTION!
CAREFULLY READ THE DOCUMENTATION OF THE MODBUS MASTER DEVICE IN ORDER TO
UNDERSTAND WHICH OF THE TWO CONVENTIONS THE MANUFACTURER HAS DECIDED TO USE
NUMBERING OF MODBUS ADDRESSES WITH "0-BASED" CONVENTION

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The numbering is:
HOLDING REGISTER MODBUS
ADDRESS (OFFSET)
MEANING
0
FIRST REGISTER
1
SECOND REGISTER
2
THIRD REGISTER
3
FOURTH REGISTER
4
FIFTH REGISTER
Therefore, the first register is at address 0.
In the following tables, this convention is indicated with “ADDRESS OFFSET”.
NUMBERING OF MODBUS ADDRESSES WITH "1 BASED" CONVENTION (STANDARD)
The numbering is that established by the Modbus consortium and is of the type:
HOLDING REGISTER MODBUS
ADDRESS 4x
MEANING
40001
FIRST REGISTER
40002
SECOND REGISTER
40003
THIRD REGISTER
40004
FOURTH REGISTER
40005
FIFTH REGISTER
In the following tables this convention is indicated with “ADDRESS 4x” since a 4 is added to the address so
that the first Modbus register is 40001.
A further convention is also possible where the number 4 is omitted in front of the register address:
HOLDING MODBUS ADDRESS
WITHOUT 4x
MEANING
1
FIRST REGISTER
2
SECOND REGISTER
3
THIRD REGISTER
4
FOURTH REGISTER
5
FIFTH REGISTER

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BIT CONVENTION WITHIN A MODBUS HOLDING REGISTER
A Modbus Holding Register consists of 16 bits with the following convention:
BIT
15
BIT
14
BIT
13
BIT
12
BIT
11
BIT
10
BIT
9
BIT
8
BIT
7
BIT
6
BIT
5
BIT
4
BIT
3
BIT
2
BIT
1
BIT
0
For instance, if the value of the register in decimal is
12300
the value 12300 in hexadecimal is:
0x300C
the hexadecimal 0x300C in binary value is:
11 0000 0000 1100
So, using the above convention, we get:
BIT
15
BIT
14
BIT
13
BIT
12
BIT
11
BIT
10
BIT
9
BIT
8
BIT
7
BIT
6
BIT
5
BIT
4
BIT
3
BIT
2
BIT
1
BIT
0
0
0
1
1
0
0
0
0
0
0
0
0
1
1
0
0
MSB and LSB BYTE CONVENTION WITHIN A MODBUS HOLDING REGISTER
A Modbus Holding Register consists of 16 bits with the following convention:
BIT
15
BIT
14
BIT
13
BIT
12
BIT
11
BIT
10
BIT
9
BIT
8
BIT
7
BIT
6
BIT
5
BIT
4
BIT
3
BIT
2
BIT
1
BIT
0
LSB Byte (Least Significant Byte) defines the 8 bits ranging from Bit 0 to Bit 7 included, we define MSB Byte
(Most Significant Byte) the 8 bits ranging from Bit 8 to Bit 15 inclusive:
BIT
15
BIT
14
BIT
13
BIT
12
BIT
11
BIT
10
BIT
9
BIT
8
BIT
7
BIT
6
BIT
5
BIT
4
BIT
3
BIT
2
BIT
1
BIT
0
BYTE MSB
BYTE LSB

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REPRESENTATION OF A 32-BIT VALUE IN TWO CONSECUTIVE MODBUS HOLDING
REGISTERS
The representation of a 32-bit value in the Modbus Holding Registers is made using 2 consecutive Holding
Registers (a Holding Register is a 16-bit register). To obtain the 32-bit value it is therefore necessary to read two
consecutive registers:
For example, if register 40064 contains the 16 most significant bits (MSW) while register 40065 contains the
least significant 16 bits (LSW), the 32-bit value is obtained by composing the 2 registers:
BIT
15
BIT
14
BIT
13
BIT
12
BIT
11
BIT
10
BIT
9
BIT
8
BIT
7
BIT
6
BIT
5
BIT
4
BIT
3
BIT
2
BIT
1
BIT
0
40064 MOST SIGNIFICANT WORD
BIT
15
BIT
14
BIT
13
BIT
12
BIT
11
BIT
10
BIT
9
BIT
8
BIT
7
BIT
6
BIT
5
BIT
4
BIT
3
BIT
2
BIT
1
BIT
0
40065 LEAST SIGNIFICANT WORD
    󰇛 󰇜
In the reading registers it is possible to swap the most significant word with the least significant word, therefore
it is possible to obtain 40064 as LSW and 40065 as MSW.
TYPE OF 32-BIT FLOATING POINT DATA (IEEE 754)
The IEEE 754 standard (https://en.wikipedia.org/wiki/IEEE_754) defines the format for representing floating
point numbers.
As already mentioned, since it is a 32-bit data type, its representation occupies two 16-bit holding registers.
To obtain a binary/hexadecimal conversion of a floating point value it is possible to refer to an online converter
at this address:
http://www.h-schmidt.net/FloatConverter/IEEE754.html

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Using the last representation the value 2.54 is represented at 32 bits as:
0x40228F5C
Since we have 16-bit registers available, the value must be divided into MSW and LSW:
0x4022 (16418 decimal) are the 16 most significant bits (MSW) while 0x8F5C (36700 decimal) are the 16 least
significant bits (LSW).

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Z-8TC-SI: MODBUS 4X HOLDING REGISTERS TABLE (FUNCTION CODE 3)
ADDRESS
(4x)
OFFSET
REGISTER
ORDER
CHANNEL
DESCRIPTION
R/W
TYPE
40001
0
MACHINE ID
-
-
Device
identification
RO
UNSIGNED
16 BIT
40002
1
MEASURE ERRORS
-
1..8
Cold Junctions
and Burnout
Errors
( 0 = OK, 1 =
ERROR)
Bit[15]=CJ Error
IN1&IN2
Bit[14]=CJ Error
IN3&IN4
Bit[13]=CJ Error
IN5&IN6
Bit[12]=CJ Error
IN7&IN8
Bit[11]=Burnout
IN1
Bit[10]=Burnout
IN2
Bit[9]=Burnout
IN3
Bit[8]=Burnout
IN4
Bit[7]=Burnout
IN5
Bit[6]=Burnout
IN6
Bit[5]=Burnout
IN7
Bit[4]=Burnout
IN8
RO
UNSIGNED
16 BIT
40003
2
INTEGER
MEASURE
-
1
Integer measure
[°C/10] or
[10*mV]
RO
SIGNED 16
BIT
40004
3
INTEGER
MEASURE
-
2
Integer measure
[°C/10] or
[10*mV]
RO
SIGNED 16
BIT
40005
4
INTEGER
MEASURE
-
3
Integer measure
[°C/10] or
[10*mV]
RO
SIGNED 16
BIT
40006
5
INTEGER
MEASURE
-
4
Integer measure
[°C/10] or
[10*mV]
RO
SIGNED 16
BIT

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40007
6
INTEGER
MEASURE
-
5
Integer measure
[°C/10] or
[10*mV]
RO
SIGNED 16
BIT
40008
7
INTEGER
MEASURE
-
6
Integer measure
[°C/10] or
[10*mV]
RO
SIGNED 16
BIT
40009
8
INTEGER
MEASURE
-
7
Integer measure
[°C/10] or
[10*mV]
RO
SIGNED 16
BIT
40010
9
INTEGER
MEASURE
-
8
Integer measure
[°C/10] or
[10*mV]
RO
SIGNED 16
BIT
40011
10
FLOAT MEASURE
MSW
1
Floating Point
Measure [°C] or
[mv]
RO
FLOAT 32
40012
11
LSW
40013
12
FLOAT MEASURE
MSW
2
Floating Point
Measure [°C] or
[mv]
RO
FLOAT 32
40014
13
LSW
40015
14
FLOAT MEASURE
MSW
3
Floating Point
Measure [°C] or
[mv]
RO
FLOAT 32
40016
15
LSW
40017
16
FLOAT MEASURE
MSW
4
Floating Point
Measure [°C] or
[mv]
RO
FLOAT 32
40018
17
LSW
40019
18
FLOAT MEASURE
MSW
5
Floating Point
Measure [°C] or
[mv]
RO
FLOAT 32
40020
19
LSW
40021
20
FLOAT MEASURE
MSW
6
Floating Point
Measure [°C] or
[mv]
RO
FLOAT 32
40022
21
LSW
40023
22
FLOAT MEASURE
MSW
7
Floating Point
Measure [°C] or
[mv]
RO
FLOAT 32
40024
23
LSW
40025
24
FLOAT MEASURE
MSW
8
Floating Point
Measure [°C] or
[mv]
RO
FLOAT 32
40026
25
LSW
40027
26
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40028
27
MEASURE CJ
-
1, 2
Cold Junction
measure [°C/10]
RO
SIGNED 16
BIT
40029
28
MEASURE CJ
-
3, 4
Cold Junction
measure [°C/10]
RO
SIGNED 16
BIT
40030
29
MEASURE CJ
-
5, 6
Cold Junction
measure [°C/10]
RO
SIGNED 16
BIT
40031
30
MEASURE CJ
-
7, 8
Cold Junction
measure [°C/10]
RO
SIGNED 16
BIT
40032
31
RESERVED
-
-
-
-
UNSIGNED
16 BIT

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40033
32
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40034
33
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40035
34
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40036
35
FIRMWARE
REVISION
-
-
-
-
UNSIGNED
16 BIT
40037
36
FLASH ERRORS
-
1, 2, 3, 4
FLASH ERRORS
( 0 = OK, 1 =
ERROR)
Bit[13]= FLASH
ERROR IN1&IN2
Bit[8]= CRC
ERROR IN1&IN2
Bit[5]= FLASH
ERROR IN3&IN4
Bit[0]= CRC
ERROR IN3&IN4
RO
UNSIGNED
16 BIT
40038
37
FLASH ERRORS
-
5, 6, 7, 8
FLASH ERRORS
( 0 = OK, 1 =
ERROR)
Bit[13]= FLASH
ERROR IN5&IN6
Bit[8]= CRC
ERROR IN5&IN6
Bit[5]= FLASH
ERROR IN7&IN8
Bit[0]= CRC
ERROR IN7&IN8
RO
UNSIGNED
16 BIT
40039
38
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40040
39
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40041
40
RESET_COMMAND
-
-
WRITE 52428
(decimal) TO
REBOOT DEVICE
RW
UNSIGNED
16 BIT
40042
41
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40043
42
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40044
43
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40045
44
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40046
45
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40047
46
RESERVED
-
-
-
-
UNSIGNED
16 BIT

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Z-8TC-SI
ALL RIGHTS RESERVED. NO PART OF THIS
PUBLICATION MAY BE REPRODUCED WITHOUT
PRIOR PERMISSION.
www.seneca.it
MI00595-2-EN
Page 19
40048
47
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40049
48
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40050
49
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40051
50
RESERVED
-
-
-
-
UNSIGNED
16 BIT
40052
51
ADDRESS_PARITY
-
-
Bit[15:8] Modbus
Address RS485:
0..255
Bit[7:0] Parity :
0=none 1=even
2=odd
RW*
UNSIGNED
16 BIT
40053
52
BAUDRATE_RS485
-
-
Bit[15:8]
Baudrate: 0=4800
1=9600 2=19200
3=38400 4=57600
5=115200 6=1200
7=2400
RW*
UNSIGNED
16 BIT
40054
53
INPUTS CONFIG
-
1
CHANNEL
CONFIGURATION
Bit[12:10] Filter:
0=NO, 1=10
elements moving
average
Bit[9:6] TC TYPE :
0= J 1= K 2= R 3= S
4= T 5= B 6= E 7=
N 8= L 9= mV
Bit[4]: Cold
Junction
Compensation :
0= no 1= yes
Bit[2:0]
Acquisition
Speed: 0=
disabled, 1=
25ms, 2= 50ms,
3= 100ms, 4=
200ms, 5= 400ms
RW*
UNSIGNED
16 BIT

User Manual
Z-8TC-SI
ALL RIGHTS RESERVED. NO PART OF THIS
PUBLICATION MAY BE REPRODUCED WITHOUT
PRIOR PERMISSION.
www.seneca.it
MI00595-2-EN
Page 20
40055
54
INPUT USER
CONFIG
-
2
CHANNEL
CONFIGURATION
Bit[12:10] Filter:
0=NO, 1=10
elements moving
average
Bit[9:6] TC TYPE :
0= J 1= K 2= R 3= S
4= T 5= B 6= E 7=
N 8= L 9= mV
Bit[4]: Cold
Junction
Compensation :
0= no 1= yes
Bit[2:0]
Acquisition
Speed: 0=
disabled, 1=
25ms, 2= 50ms,
3= 100ms, 4=
200ms, 5= 400ms
RW*
UNSIGNED
16 BIT
40056
55
INPUT USER
CONFIG
-
3
CHANNEL
CONFIGURATION
Bit[12:10] Filter:
0=NO, 1=10
elements moving
average
Bit[9:6] TC TYPE :
0= J 1= K 2= R 3= S
4= T 5= B 6= E 7=
N 8= L 9= mV
Bit[4]: Cold
Junction
Compensation :
0= no 1= yes
Bit[2:0]
Acquisition
Speed: 0=
disabled, 1=
25ms, 2= 50ms,
3= 100ms, 4=
200ms, 5= 400ms
RW*
UNSIGNED
16 BIT