RIO-9GH Registers

Coils (0XXXX)

DO1		1
DO2		2
DO3		3

Discrete Inputs (1XXXX)

DI1		1
DI2		2

Input Registers (3XXXX)

Channel 1	0=0mA, 4095=20mA	1
Channel 2	0=0mA, 4095=20mA	2
Channel 3	0=0mA, 4095=20mA	3
Channel 4	0=0mA, 4095=20mA	4
Channel 5	0=0mA, 4095=20mA	5
Supply	4095=FS	6

Channel 1	0=4mA, 32767=20mA	11
Channel 2	0=4mA, 32767=20mA	12
Channel 3	0=4mA, 32767=20mA	13
Channel 4	0=4mA, 32767=20mA	14
Channel 5	0=4mA, 32767=20mA	15

Channel 1	0=0mA, 32767=20mA	21
Channel 2	0=0mA, 32767=20mA	22
Channel 3	0=0mA, 32767=20mA	23
Channel 4	0=0mA, 32767=20mA	24
Channel 5	0=0mA, 32767=20mA	25
Supply	32767=FS	26

Channel 1	0=4mA, 4095=20mA	31
Channel 2	0=4mA, 4095=20mA	32
Channel 3	0=4mA, 4095=20mA	33
Channel 4	0=4mA, 4095=20mA	34
Channel 5	0=4mA, 4095=20mA	35

Channel 1	raw, for cal. only	41
Channel 2	raw, for cal. only	42
Channel 3	raw, for cal. only	43
Channel 4	raw, for cal. only	44
Channel 5	raw, for cal. only	45
Supply	raw, for cal. only	46

Holding Registers (4XXXX)

DI1Count		1
DI2Count		2

Debounce	in ms	11

BaudRate		21
SerialMode	parity & stop bits	22
SerialTimeout	default=2000	23
ShortTimeout	default=5	24
RespDelay	in ms	25

LEDControl	0=off, 1=on	31

ADCOffset1	signed	41
ADCOffset2	signed	42
ADCOffset3	signed	43
ADCOffset4	signed	44
ADCOffset5	signed	45

ADCScale1	4095=unscaled	51
ADCScale2	4095=unscaled	52
ADCScale3	4095=unscaled	53
ADCScale4	4095=unscaled	54
ADCScale5	4095=unscaled	55
ADCScale6	4095=unscaled	56

Pulse1	in ms	61
Pulse2	in ms	62
Pulse3	in ms	63

BCastReset	see below	71-73
Address		74

HighTime1	in ms	81
HighTime2	in ms	82

LowTime1	in ms	91
LowTime2	in ms	92

RiseRise1	in ms	101
RiseRise2	in ms	102

FallFall1	in ms	111
FallFall2	in ms	112

DI1LongCount		121-122
DI2LongCount		123-124

SerialNum		131-132
RadioSNum	radio serial number	133-134

LastCalTimestamp	Unix format	141-142
CalInitials		143-144
LastUpdateTimestamp	Unix format	145-146

Broadcast Reset

The Modbus address of a RIO-9GH device can be changed by broadcasting (i.e. sending to Modbus address 0) a write to holding registers 71-73.

The write should be done with a single, Write Multiple Registers command. In the first two registers (most signifigant word followed by least signifigant word), you should write the device's serial number. In the last register, you should write the new Modbus address.

As per the Modbus standard, the RIO device will not respond to this broadcast. Immediately after receipt, the RIO device will begin responding to requests made of the new address.