Emerson device driver

Emerson

The device driver is used for SK series HMI to read and write the data or state of Emerson EC series PLC register. The serial communication connection is established through the serial port of HMI and the serial port of Emerson EC series PLC, so as to operate Emerson EC series PLC. Prior to use of the driver, one shall carefully read related technical specifications of the chapter and Emerson EC series PLC.

How to establish connection with Emerson EC series PLC

1. Hardware connection

Connecting cable:

RS232

SK series HMI COM1/COM2		Emerson EC
2	RX	5	TX
3	TX	4	RX
5	GND	3	GND

Terminal of HMI is DB9F, and that of Emerson EC series PLC is MD8M.

2. Software settings

Select Emerson Network Power in connection device service.

Select the corresponding item in connection device service according to the connected PLC model or supported protocol.

Ensure that the communication parameters in touch screen connection parameters and PLC station number are consistent with the PLC connected.

For settings of the PLC connected, refer to the technical documents of the Emerson EC series PLC.

Default connection parameters of HMI series touch screen

Setting item	Default parameter value	Setting scope
PLC type	EC Series (RTU)	EC Series (RTU)
Communication port type	RS232	RS232/RS422/RS485
Baud rate	9600	1200/2400/4800/9600/19200/38400/57600/115200
Data bit length	7	7/8
Parity bit	EVEN	EVEN/ODD/NONE
Stop bit length	1	1/2
PLC station number	1	0~255
HMI station number	0	0~255

Supporting function	Whether it is supported
Off-line simulation	Yes
On-line simulation	Yes
Extended mode	Yes

3. Operational register and address range

Register name	Address format	Input range	Remarks
X	ooo	0~377	Bit: input connection point, read only
Y	ooo	0~377	Bit: output connection point
M	dddd	0~7999	Bit: internal relay
SM	ddd	0~255	Bit: special internal relay
S	ddd	0~999	Bit: Stepping relay
T	ddd	0~255	Bit: timer status
C	ddd	0~255	Bit: counter status
D	dddd	0~7999	Word: temporary data storage
SD	ddd	0~255	Word: special temporary data storage
TV	ddd	0~255	Word: current value of timer
CV	ddd	0~255	Word: current value of counter
Z	dd	0~15	Word: indexed addressing register
D_Double	dddd	0~7999	Double word: temporary data storage
CV_Double	ddd	200~255	Double word: current value of counter
SD_Double	ddd	0~255	Double word: special temporary data storage

Note:

d represents decimal system, input range is 0-9;

o represents octal system, input range is 0-7;

Bit in the remarks: represents the register can only be used as bit;

Word in the remarks: represents the register can only be used as word;

Double-word in the remarks: represents that the data type of the register in configuration must be 32-bit;

Read only in the remarks represents that the register can only be read but not be written;

The names of the registers supported by different equipment model may be different, and the scopes may also be different.

For detailed name and scope, please consult related technical document of the connected device.