SBC PCD7.LR P5 Series - Page 96

Hardware manual PCD7.LRxx-PG5 room controller │ Document 27-653; version ENG07 │ 2019-03-21
Saia-Burgess Controls AG Communication
5
5-20
Modbus on PCD7.LRxx-P5 RS-485 interfaces
PCD7.LRxx-P5 read Modbus values from PCD1/2/3
PCD 1/2/3 PCD7.LRxx-P5
Media mapping on the PCD 1/2/3 acting as
Modbus server
PCD7.LRxx-P5 acting as Modbus client, reading 16-bit or 32-bit values from the server.
Example: if client reads out 12 Modbus objects, where the content of the Modbus objects is

11112222 hex for HR0 / HR1,
33334444 hex for HR2 / HR3 … as shown on the left side of the table.
PCD 1/2/3
Register
Number on
the IRM-P5
Modbus
Holding
Register
Number
Example for
value stored
on the PCD
register of the
PCD 1/2/3
PCD7.LRxx-P5
Register Number
PCD7.LRxx-P5
Register con-
tent if value is
stored as 16 bit
unsigned
Modbus object
number = PCD
register number
PCD7.LRxx-P5
Register con-
tent if value is
stored as 16 bit
signed
Modbus object
number = PCD
register number
PCD7.Lxx-P5
Register content if
value is stored as
32 bit
Modbus object
range 10001 and
higher must be
used on the PCD
1/2/3.
To access register
600, it is neces-
sary to access the
Modbus object
11201
(2 x 600 + 10001)
PCD7.LRxx-P5
Register content if
value is stored as
32 bit swapped
Modbus object
range 10001 and
higher must be
used on the PCD
1/2/3.
To access register
600, it is neces-
sary to access the
Modbus object
11201
(2 x 600 + 10001)
PCD Reg
HR0 /
HR1
11112222
hex
PCD Reg
00002222
hex
00002222
hex
11112222
hex
22221111
hex
PCD Reg+1
HR2 /
HR3
33334444
hex
PCD Reg + 1
00004444
hex
00004444
hex
33334444
hex
44443333
hex
PCD Reg+2
HR4 /
HR5
55556666
hex
PCD Reg + 2
00006666
hex
00006666
hex
55556666
hex
66665555
hex
PCD Reg+3
HR6 /
HR7
77778888
hex
PCD Reg + 3
00008888
hex
FFFF8888
hex
77778888
hex
88887777
hex
PCD Reg+4
HR8 /
HR9
9999AAAA
hex
PCD Reg + 4
0000AAAA
hex
FFFFAAAA
hex
9999AAAA
hex
AAAA9999
hex
PCD Reg+5
HR10 /
HR11
BBBBCCCC
hex
PCD Reg + 5
0000CCCC
hex
FFFFCCCC
hex
BBBBCCCC
hex
CCCCBBBB
hex
PCD Reg+6
HR12 /
HR13
DDDDEEEE
hex
PCD Reg + 6
0000EEEE
hex
FFFFEEEE
hex
DDDDEEEE
hex
EEEEDDDD
hex
PCD Reg+7
HR14 /
HR15
FFFF1111
hex
PCD Reg + 7
00001111
hex
00001111
hex
FFFF1111
hex
1111FFFF
hex
PCD Reg+8
HR16 /
HR17
22223333
hex
PCD Reg + 8
00003333
hex
00003333
hex
22223333
hex
33332222
hex
PCD Reg+9
HR18 /
HR19
44445555
hex
PCD Reg + 9
00005555
hex
00005555
hex
44445555
hex
55554444
hex
PCD Reg+10
HR20 /
HR21
66667777
hex
PCD Reg + 10
00007777
hex
00007777
hex
66667777
hex
77776666
hex
PCD Reg+11
HR22 /
HR23
88889999
hex
PCD Reg +11
00009999
hex
FFFF9999
hex
88889999
hex
99998888
hex
PCD Reg+12
HR24 /
HR25
AAAABBBB
hex
PCD Reg + 12 Untouched Untouched Untouched Untouched