NETWORKING
DIP SWITCH SETTINGS
Each fan filter unit in a network must be set to a unique address between 1 and 247.
Addresses 248- 255 are declared reserved per MODBUS protocol. A DIP switch block
of eight switches are used for addressing. The control board supports Modbus Broadcast
Address Zero for single and multiple register write commands (Modbus Function Codes 6 and 16).
Address settings are checked by the board controller only at power-up,
so power must be cycled before any changes take effect.
Analog input setpoint modes preserve the ability to monitor and modify register
values using a suitable controller console or PLC.
Therefore, addressing may be relevant for configuration, monitoring and/or troubleshooting
even when units are intended to be used with analog setpoint input.
Address Selection
When adjusted to the ON position, each DIP switch pole represents a value as follows:
Calculate the address value of existing switch settings
by adding the values of each DIP switch pole in the ON
position, per the table at left.
Construct switch settings for a desired address value by
successively subtracting the largest pole value that is less
than the desired address value, repeating with each
remainder until the remainder is zero. An example is provided
below.
Example: Desired address is 114
114 - 64 = 50 SW1-7 ON
50 - 32 = 18 SW1-6 ON
18 - 16 = 2 SW1-5 ON
2 - 2 =
0
SW1-2 ON
64+32+16+2 = 114
*See page 23 for more
examples
DIP Switch Pole Value
1
1
2
2
3
4
4
8
5
16
6
32
7
64
8
128
DRAWING NAME
DRAWN
CATEGORY
CHKD
APRVD
PRODUCT
SIZE
TAG
QTY
BRS/SLG
01/24/22
CRITI-CLEAN ORIGINAL INSTALLATION MANUAL
SSLFHFD-FP, SSLFHFD-FP-MEA
REV # F
SHT 20 29
/
SCL
DO NOT
SCALE
1:10
STAINLESS STEEL
CRITI-CLEAN ORIGINAL
FAN FILTER UNITS
