S+S Regeltechnik HYGRASGARD MODBUS Notice D'instruction page 11

G
®
HYGRASGARD
BUS ADDRESS
Bus address
(binary coded, value selectable from 1 to 247)
DIP 1 DIP 2 DIP 3
128 64
O N O N
Example shows 128 + 64 + 1 = 193 as Modbus address.
The device address in the range of 1 to 247 is set at DIP switch [A].
For switch positions 1 to 8 see the table on the back!
Address 0 is reserved for broadcast messages.
Addresses greater than 247 must not be assigned and are ignored by the device.
The DIP switches are binary-coded with the following values:
DIP 1 = 128 ............ DIP 1 = ON
DIP 2 = 64 ............ DIP 2 = ON
DIP 3 = 32 ............ DIP 3 = OFF
DIP 4 = 16 ............ DIP 4 = OFF
DIP 5 = 8 ............ DIP 5 = OFF
DIP 6 = 4 ............ DIP 6 = OFF
DIP 7 = 2 ............ DIP 7 = OFF
DIP 8 = 1 ............ DIP 8 = ON
BUS PARAMETERS
Baud rate
(selectable)
9600 baud
19200 baud
38400 baud
Reserved
Parity
(selectable)
EVEN-numbered
ODD-numbered
Baud rate (speed of transmission) is set at DIP switches 1 and 2 of DIP switch block [B].
Selectable are 9600 baud, 19200 baud, or 38400 baud – see table!
Parity is set at DIP switch 3 of DIP switch block [B].
Selectable are EVEN or ODD – see table!
Parity check is activated via DIP switch 4 of DIP switch block [B].
Selectable are active (1 stop bit), or inactive (2 stop bits), i.e. no parity check – see table!
DIP switch 5 of DIP switch block [B] is not assigned.
Bus termination is activated via DIP switch 6 of DIP switch block [B].
Selectable are active (bus termination resistance of 120 Ohm), or inactive (no bus termination) – see table!
When bus parameters and bus address are changed at devices with display,
the respective settings are shown on the display for approx. 30 seconds.
COMMUNICATION INDICATOR
Communication is indicated via two LEDs.
Error-free received telegrams are signalized by the green LED lighting up, regardless of the device address.
Faulty telegrams or triggered Modbus exception telegrams are depicted by the red LED lighting up.
DIAGNOSTICS
An error diagnostic function is integrated
MODBUS | Configuration
DIP 4 DIP 5 DIP 6
32 16 8
OFF OFF OFF OFF
The switch positions shown here results in the Modbus address 128 + 64 + 1 = 193
DIP 1 DIP 2
(DIP 5 is not assigned)
O N OFF
O N O N
OFF O N
OFF OFF
Parity check
DIP 3
(selectable with/without)
O N Active (1 stop bit)
OFF Inactive (no parity) (2 stop bit)
DIP 7 DIP 8
4 2 1
OFF O N
MODBUS
DIP switch [ B ]
ON DIP B
1 2 3 4 5 6
DIP 4
O N
OFF
11
MODBUS
DIP switch [ A ]
ON DIP A
1 2 3 4 5 6 7 8
Bus termination
(selectable with/without)
Active
Inactive
Rev. 2016 - V12 GB intro
DIP 6
O N
OFF