Vega VEGAMET 624 User manual

Supplementary instructions manual
Modbus-TCP,VEGA ASCII protocol
VEGAMET 624/625,VEGASCAN 693,PLICSRADIO
®
C62
Signal conditioning instruments
and communication
in out

Contents
1Function as Modbus-TCP server
1.1Modbus-TCP -general description . . . . . . . . . . 3
1.2Filing of the measured value as 2byte short . . . 3
1.3Filing of measured value as 4Byte Float. . . . . . 6
2VEGA ASCII protocol
2.1Measured value enquiry via ASCII protocol . . . . 10
2.2Overview of the commands and options . . . . . . 11
2.3Version enquiry with command VERSION . . . . . 12
2.4Help with command HELP . . . . . . . . . . . . . . . . 12
2.5Delete the settings with the command
CLEARSTORE . . . . . . . . . . . . . . . . . . . . . . . . 13
2.6Measured value enquiry with command %. . . . 13
2.7Measured value enquiry with command &. . . . . 18
2.8Measured value enquiry with command?. . . . . . 24
2.9Measured value enquiry with command $. . . . . 29
2.10 Option TIME . . . . . . . . . . . . . . . . . . . . . . . . . . 35
2.11 Option REPEAT x. . . . . . . . . . . . . . . . . . . . . . 35
2.12 Option STORE . . . . . . . . . . . . . . . . . . . . . . . . 36
2.13 Option SUM . . . . . . . . . . . . . . . . . . . . . . . . . . 36
2Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO
Contents
30768-EN-070730

1Function as Modbus-TCP server
1.1Modbus-TCP -general description
VEGAMET 624/625,VEGASCAN 693 and PLICSRADIO
®
C62 signal conditioning instruments work as Modbus-TCP
server and provide the existing PC/DCS value and relay
switching conditions in a temporary storage for collection via
Modbus-TCP.
The instruments stick to the "Open Modbus-TCP-Specifica-
tion"Release 1.0of Schneider Electric.This standard is
supported by many process control systems,Remote IOs,
visualisation programs and OPC servers.Communication is
carried out via Port 502.
Apart from PC/DCS values there is the possibility to enquire
the switching conditions of the relay outputs.
The enquiry of the PC/DCS values and relay values is made
via the appropriate function code (see also Modbus specifi-
cation).
lFunction code 01:Read Coil Status (enquiry of the relay
values)
lFunction code 02:Read Input Status (enquiry of the relay
values)
lFunction code 03:Read Holding Registers (enquiry of the
PC/DCS values)
lFunction code 04:Read Input Registers (enquiry of the PC/
DCS values)
These function codes are normally available as library
enquiries in the PLC (e.g.Modicon).
VEGAMET 624/625 and PLICSRADIO
®
C62 can provide up to
six PC/DCS outputs,VEGASCAN 693 up to 30.There are also
four relay values (one fail safe relay,three level relais,with
VEGASCAN one fail safe relay).
Via the selected PC/DCS output you define where the
respective measured value can be collected within the
temporary memory.The configuration of the PC/DCS outputs
is carried out via PACTware™/DTM.
1.2Filing of the measured value as 2byte short
The adressing of the PC/DCS values for Modbus systems is
carried out "Word-orientated".In the temporary memory,aPC/
PC/DCS output
Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO 3
Function as Modbus-TCP server
30768-EN-070730

DCS value is represented by two words.The first word
contains the real PC/DCS value,the next higher word the
corresponding status information.In the specification the term
register word is also used instead of word.
The filing of measured values in the temporary memory is
always sorted according to PC/DCS output number.The
following chart shows the addressing of the temporary memory
via Modbus.
Register address in
Modicon
Temporary memory of VEGAMET/PLICSRA-
DIO (1word =2byte)
30001 PC/DCS output 1:Measured value
30002 PC/DCS output 1:Status
30003 PC/DCS output 2:Measured value
30004 PC/DCS output 2:Status
30005 PC/DCS output 3:Measured value
30006 PC/DCS output 3:Status
30007 PC/DCS output 4:Measured value
30008 PC/DCS output 4:Status
30009 PC/DCS output 5:Measured value
30010 PC/DCS output 5:Status
30011 PC/DCS output 6:Measured value
30012 PC/DCS output 6:Status
Register address in
Modicon
Temporary memory of VEGASCAN (1word =
2byte)
30001 PC/DCS output 1:Measured value
30002 PC/DCS output 1:Status
30003 PC/DCS output 2:Measured value
30004 PC/DCS output 2:Status
30005 PC/DCS output 3:Measured value
30006 PC/DCS output 3:Status
30007 PC/DCS output 4:Measured value
30008 PC/DCS output 4:Status
30009 PC/DCS output 5:Measured value
30010 PC/DCS output 5:Status
30011 PC/DCS output 6:Measured value
4Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO
Function as Modbus-TCP server
30768-EN-070730

Register address in
Modicon
Temporary memory of VEGASCAN (1word =
2byte)
30012 PC/DCS output 6:Status
… …
30057 PC/DCS output 29:Measured value
30058 PC/DCS output 29:Status
30059 PC/DCS output 30:Measured value
30060 PC/DCS output 30:Status
Aa an alternative,register address 40001 is also available as
start address (function code 03).
The actual measured values are transmitted as signed data
comprising two octets.This means that the value range
encompasses max.+32768 to -32767.In addition to the
measured value,the status of the measured value is delivered
in a second register word.
Example of the data of a PC/DCS output
Measured value Status
Register addr.30001 Register addr.30002
High-Byte/Low-Byte High-Byte/Low-Byte
The status describes the condition of the associated measured
value.The content of the measured value is only valid if the
corresponding status has the value zero.If there is a status
value unequal zero,the status value and the corresponding
value in the measured value field must be taken into account in
a detailed failure diagnosis.The following chart explains the
possible faults.
Status Measured val-
ue
Meaning
0x00 0xXXXX Valid measured value
0xXX 0x8000 An error number is transmitted in the status
corresponding to the error codes Exx (e.g.29 =
E29 =Simulation).
0xXX 0x00XX An error number is transmitted in the status and
in the measured value which corresponds to the
error codes Exx.Must be configured via DTM.
Format of the PC/DCS value
Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO 5
Function as Modbus-TCP server
30768-EN-070730

Note:
When transmitting the PC/DCS value in Modbus-TCP protocol
(measured value filing as 2byte short), the decimal point is not
transmitted,the value -0,5bar is transmitted as -50.If the data
format was selected in such a way that values outside the
value range can be caused,limitation to the highest value of
the value range is made.
Example:Percent was selected as "Reference value "and #.
### as "Data format ".With this setting,the value 100 %should
be transmitted as 100000 which is outside the valid range of
max.+32767.This means that a limit will be imposed and
32767 transmitted instead.To avoid this,"Data format "#.##
should be chosen so that the value 100 %is transmitted as
10000.
Note:
With the switching inputs of PLICSRADIO
®
C62 (measure-
ment loops 4…6)the value 0(switch open)and 100 (switch
closed)are transmitted as measured values,the units are
deleted.
The switching conditions of the relay are transferred as bit
information.
The following equivalencies apply to the switching relays:
l0=Switching status Off
l1=Switching status On
The following equivalencies apply to the fail safe relay:
l0=Failure message Off,relay switching condition On
l1=Failure message Off,relay switching condition Off
The following chart shows the addressing of the temporary
memory via Modbus.
Register address in
Modicon
Temporary memory of VEGAMET/PLICSRA-
DIO (1bit)
10001 Fail safe relay
10002 Relay 1
10003 Relay 2
10004 Relay 3
1.3Filing of measured value as 4Byte Float
The filing of measured values in the temporary memory is
Filing of the relay values
6Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO
Function as Modbus-TCP server
30768-EN-070730

always sorted according to PC/DCS output number.The
following chart shows the addressing of the temporary memory
via Modbus.The values are accessed via FC 3and 4.The
status information is also transmitted as float value.8byte are
needed for one output,corresponding to 4registers.
Information:
Note:Afloat value comprises 2registers,i.e.a total of 4bytes!
Register address in
Modicon
Temporary memory of VEGAMET/PLICSRA-
DIO (2words =4byte)
31001 PC/DCS output 1:Measured value
31003 PC/DCS output 1:Status
31005 PC/DCS output 2:Measured value
31007 PC/DCS output 2:Status
31009 PC/DCS output 3:Measured value
31011 PC/DCS output 3:Status
31013 PC/DCS output 4:Measured value
31015 PC/DCS output 4:Status
31017 PC/DCS output 5:Measured value
31019 PC/DCS output 5:Status
31021 PC/DCS output 6:Measured value
31023 PC/DCS output 6:Status
Register address in
Modicon
Temporary memory of VEGASCAN (2words =
4byte)
31001 PC/DCS output 1:Measured value
31003 PC/DCS output 1:Status
31005 PC/DCS output 2:Measured value
31007 PC/DCS output 2:Status
31009 PC/DCS output 3:Measured value
31011 PC/DCS output 3:Status
31013 PC/DCS output 4:Measured value
31015 PC/DCS output 4:Status
31017 PC/DCS output 5:Measured value
31019 PC/DCS output 5:Status
31021 PC/DCS output 6:Measured value
Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO 7
Function as Modbus-TCP server
30768-EN-070730

Register address in
Modicon
Temporary memory of VEGASCAN (2words =
4byte)
31023 PC/DCS output 6:Status
… …
31113 PC/DCS output 29:Measured value
31115 PC/DCS output 29:Status
31117 PC/DCS output 30:Measured value
31119 PC/DCS output 30:Status
As an alternative,register address 41001 is also available as
start address (function code 03).
The actual measured values are transmitted as signed data
comprising four octets.In addition to the measured value,the
status of the measured value is supplied in a second register
word.
Example of the data of a PC/DCS output
Float Bit 15…0Float Bit 31…16
Register addr.31001 Register addr.31002
High-Byte/Low-Byte High-Byte/Low-Byte
Note:
With the switching inputs of PLICSRADIO
®
C62 (measure-
ment loops 4…6)the value 0(switch open)and 100 (switch
closed)are transmitted as measured values,the units are
deleted.
984 Floating point:Intel single precision real.First register
contains bits 15 …0of 32 bit number (bits 15 …0of
significand). Second register contains bits 31 …16 of 32 bit
number (exponent and bits 23 …16 of significand).
The status describes the condition of the associated measured
value.The content of the measured value is only valid if the
corresponding status has the value zero.If there is a status
value unequal zero,the status value and the corresponding
value in the measured value field must be taken into account in
a detailed failure diagnosis.The following chart explains the
possible faults.
Format of the PC/DCS value
Floating point of OPEN MOD-
BUS/TCP SPECIFICATION
8Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO
Function as Modbus-TCP server
30768-EN-070730

Status Measured val-
ue
Meaning
0XXXX Valid measured value
<> 0 0 An error number is transmitted in the status
corresponding to the error codes Exx (e.g.29 =
E29 =Simulation).
<> 0XX0XX An error number is transmitted in the status and
in the measured value which corresponds to the
error codes Exx.Must be configured via DTM.
The switching conditions of the relay are transferred as bit
information.
The following equivalencies apply to the switching relays:
l0=Switching status Off
l1=Switching status On
The following equivalencies apply to the fail safe relay:
l0=Failure message Off,relay switching condition On
l1=Failure message Off,relay switching condition Off
The following chart shows the addressing of the temporary
memory via Modbus.
Register address in
Modicon
Temporary memory of VEGAMET/PLICSRA-
DIO (1bit)
10001 Fail safe relay
10002 Relay 1
10003 Relay 2
10004 Relay 3
As an alternative,register address 00001 is also available as
start address.
Filing of the relay values
Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO 9
Function as Modbus-TCP server
30768-EN-070730

2VEGA ASCII protocol
2.1Measured value enquiry via ASCII protocol
With the VEGA ASCII protocol you have the ability to enquire
PC/DCS values via the Ethernet or RS232 interface.By using
ASCII characters,a measured value enquiry is possible with
easy terminal programs such as HyperTerminal.
The PC/DCS values are retrieved by special commands.It is
possible to get the measured value in different resolutions,
with/without unit or with current date/time.
The activation of the VEGA ASCII protocol is carried out by
means of the instrument DTM under "Device settings -RS232
interface".For the VEGA ASCII protocol the following interface
parameters are set per default:
lCoding system:8Bits,ASCII
lBaud rate:9600 Bits/sec
lData bits:8
lParity:none
lStop bits:1
For direct connection between signal conditioning instrument
and PC or DCS,the RS232 modem connection cable and an
additionally connected interlink cable from the scope of
delivery will be required.If connection is provided via modem,
only the attached RS232 modem connection cable is used.
You will find further information in chapter "Connection".
The VEGA ASCII protocol is handled via the TCP/IP -Port 503.
When using the terminal program HyperTerminal,the following
settings are required:
lIP addr.of the signal conditioning instrument:
192.168.200.200 (default setting)
lTCP/IP Port:503
lConnection:TCP/IP
Access via RS232
Access via Ethernet
10 Modbus-TCP,VEGA ASCII protocol -VEGAMET 624/625,VEGASCAN 693,PLICSRADIO
VEGA ASCII protocol
30768-EN-070730