USER MANUAL – Z-PASS1/Z-PASS2
67
Possible values: [1..255].
This parameter is meaningful only for
Z-PASS1-IO and Z-PASS2-IO products.
The Modbus Registers representing the Digital I/Os are given in the following tables:
Data Type
Digital I/Os
Address
Holding Registers
Bit 0: DI1 (LSB)
Bit 1: DI2
Bit 2: DI3
Bit 3: DI4
0 (40001)
Holding Registers
Bit 0: DO1 (LSB)
Bit 1: DO2
Bit 2: DO3
Bit 3: DO4
0 (40002)
Discrete Inputs
DI1
0 (10001)
Discrete Inputs
DI2
1 (10002)
Discrete Inputs
DI3
2 (10003)
Discrete Inputs
DI4
3 (10004)
Coils
DO1
0
Coils
DO2
1
Coils
DO3
2
Coils
DO4
3
The mapping between DI1..DI4, DO1..DO4 and the Digital I/O names described in 18.13 paragraph is as
follows:
DI1
DI 1
DI2
DI 2
DI3
DIDO 1, if input
DI4
DIDO 2, if input
DO1
DO 1
DO2
DO 2
DO3
DIDO 1, if output
DO4
DIDO 2, if output
If DIx or DOx is not available (e.g.: DI4, when DIDO 2 is configured as an output), the corresponding bit
value is always 0.
DOx can be actually set only if the corresponding Digital I/O Mode is “General Output” (see 18.13
paragraph); otherwise, the write request will have no effect.
18.4.2
Transparent Bridge
Selecting “Transparent Bridge” as the gateway mode, the “Gateway Configuration” page will change to look
like the one shown in the following figure:
