DI8.1

Modbus Registers

Below is a list of available device MODBUS registers. The same register numbers are also used by the MIOS-2 protocol.

Modbus Read / Write (0x17) Function

METEL IO modules have implemented MODBUS function (0x17) Read/Write of Multiple registers. Typically it is required to have two separate requests (and responses) for: 1) Writing of outputs via MODBUS function (0x16) Write Multiple Registers 2) Reading of inputs via MODBUS function (0x03) Read Holding Registers This requires a total of 4 frames to be sent over MODBUS. If using 0x17 function only one request is needed for the writing and reading of outputs. This requires a total of 2 frames to be sent over MODBUS.

Default Settings of Communication

Device ID: 1
Baudrate: 115 200
Parity: None
Data bits: 8
Stop bits: 1

Subject		Channel	Type	R/W	Value	Offset
States of Digital Inputs and Relay Outputs	Digital Input 1	DI#01	bit	R	0 = inactive 1 = active	3001
	Digital Input 2	DI#02	bit	R		3002
	Digital Input 3	DI#03	bit	R		3003
	Digital Input 4	DI#04	bit	R		3004
	Digital Input 5	DI#05	bit	R		3005
	Digital Input 6	DI#06	bit	R		3006
	Digital Input 7	DI#07	bit	R		3007
	Digital Input 8	DI#08	bit	R		3008
	COIL Relay 1	DI#09	bit	R		3009
	COIL Relay 2	DI#10	bit	R		3010
	COIL Relay 3	DI#11	bit	R		3011
	COIL Relay 4	DI#12	bit	R		3012
	Inputs	DI#16 - DI#01	u16	R	0x0000 - 0x0FFF	3001

Subject		Channel	Type	R/W	Value	Offset
Relay and Push-Pull Outputs	Relay Output 1	DO#01	bit	RW	0 = inactive 1 = active	4001
	Relay Output 2	DO#02	bit	RW		4002
	Relay Output 3	DO#03	bit	RW		4003
	Relay Output 4	DO#04	bit	RW		4004
	Push-Pull Output 1	DO#05	bit	RW		4005
	Push-Pull Output 2	DO#06	bit	RW		4006
	Outputs	DO#16 - DO#01	16	RW	0x0000 - 0x003F	4001
Modes of Outputs	Push-Pull Output 1	DO#05	16	RW	0 = None (default) 1 = Push (PNP) 2 = Pull (NPN)	4105
	Push-Pull Output 2	DO#06	16	RW		4106

Subject		Type	R/W	Value	Offset
Device Identity	Product Type	u8[3]	R		1002-04
	Serial Number	u32	R		1005-06
	PCB Version	u32	R		1007-08
	PCB Revision	u16	R		1009
	FW Version Major	u16	R		1010
	FW Version Minor	u16	R		1011
	FW Version - Revision	u32	R		1012-13
	IF#01 Slot State	u16	R	0 = N/A 1 = IF#01 not Inserted 2 = IF#01 Inserted, CRC error 3 = IF#01 Inserted, CRC OK	1021
	IF#01 Product Type	u8[3]	R		1022-24
	IF#01 Serial Number	u32	R		1025-26
	IF#01 PCB Version	u32	R		1027-28
	IF#01 PCB Revision	u16	R		1029
Device Control	Reset	u16	RW	55203 = To Reboot	1201
	Bootloader / Application	u16	R	0x00A – Application, 0x00B – Bootloader	1203
	Restart to Bootloader	u16	RW	617 = To Bootloader else = deactivate bootloader	1204
Device Status	Board Power Voltage	u16	R	105 = 10,5V	1311
	Board Temperature	u16	R	-200 = -20,0°C 250 = 25,0°C	1321

Note: To activate the bootloader, it is necessary to write a value 617 in to the registry with offset 1204 and restart the device.