User Manual For - CONTROLLER/DATA RECORDER MultiCon CMC-99/141
–
Status register
- this parameter allows the user to review the number and data
format of the status register,
–
Dec. point register
- this parameter allows the user to review the number and data
format of the decimal point register,
Avail. output blocks
submenu
This submenu is read only and consists of the following fields:
–
Block type
- a read only parameter, the user can review the options that were set in
the
Output list
submenu. Available options:
•
read HOLDING register
- read only register,
•
write HOLDING register
- read and write register,
•
read INPUT register
- read only register,
–
Register size
- defines data size, can be set to:
•
16-bit registers
- data is read/preset as 16 bit registers; this value can also be
used for 32-bit registers reading/presetting. In such a case data is composed as
two 16-bit registers,
•
32-bit registers
- for 32-bit registers reading/preseting only, data is read as one
32-bit register.
–
First register
- value indicating the number of the first register of the block,
–
Last register
- value indicating the number of the last register of the block, for a
single block with one 16-bit register the parameter
First register
and
Last register
must be the same number register,
HOLDING
registers can be set as
read
or
read and write
. That is why when
the
Block type
parameter is set as
read HOLDING reg.
, in this block, registers are
read
type. When this block is set as
write HOLDING reg.
, in this block, register are
read and write
type.
7.15.2.3.
Modbus SLAVE - The Modbus protocol handling
Parameters for Modbus RTU implemented in MultiCon
Transmission parameters:
1 start bit, 8 data bits, 1/2 stop bit, no/even/odd parity control
Baud rate:
selectable from: 1200 to 115200 bits/second
Transmission protocol:
MODBUS RTU compatible
7.15.2.4.
Modbus SLAVE - List of registers
The device parameters and measurement result are available via the RS-485 interface,
as HOLDING and INPUT type registers of Modbus RTU protocol and via Ethernet interface as
HOLDING and INPUT type registers of MODBUS TPC/IP. The registers (or groups of the
registers) can be read by 04h function when a register is set as INPUT type or by 03h function
when a register is set as HOLDING type. HOLDING type registers can be written by 06h
(single registers) or 10h (group of the registers) accordingly to the Modbus RTU and TCP/IP
specification.
239
i
