Hardware manual PCD7.LRxx-PG5 room controller │ Document 27-653; version ENG07 │ 2019-03-21
Saia-Burgess Controls AG
Communication
5
5-19
Modbus on PCD7.LRxx-P5 RS-485 interfaces
Registers - Analogue Outputs
PCD7.LRL2-P5
PCD7-LRL4-P5
PCD7.LRL5-P5
PCD7.LRS4-P5
PCD7.LRS5-P5
Analogue
Output
Modbus
register
address
PCD
register
address
Modbus
register
address
PCD
register
address
Modbus
register
address
PCD
register
address
Modbus
register
address
PCD
register
address
Modbus
register
address
PCD
register
address
AO 0
8040
4020
8040
4020
8040
4020
8040
4020
8040
4020
8041
8041
8041
8041
8041
AO 1
8042
4021
8042
4021
8042
4021
8042
4021
8042
4021
8043
8043
8043
8043
8043
AO 2
NA
NA
8044
4022
8044
4022
8044
4022
8044
4022
NA
8045
8045
8045
8045
AO 3
NA
NA
8046
4023
8046
4023
8046
4023
8046
4023
NA
8047
8047
8047
8047
AO 4
NA
NA
8048
4024
8048
4024
NA
NA
NA
NA
NA
8049
8049
NA
NA
AO 5
NA
NA
8050
4025
8050
4025
NA
NA
NA
NA
NA
8051
8051
NA
NA
Example of storage of Modbus data in PCD register, depending on the options
selected (16/32-bit, signed, swapped)
PCD1/2/3 read Modbus values from PCD7.LRxx-P5
PCD7.LRxx-P5
PCD 1/2/3
Media mapping on the PCD7.LRxx-P5
acting as Modbus server
PCD 1/2/3 acting as Modbus client, reading 16-bit or 32-bit values from the server.
Example: if the client reads out 12 Modbus objects, where the content of the Modbus objects is
defined as
11112222 hex for HR0 / HR1,
33334444 hex for HR2 / HR3 … as shown on the left side of the table.
PCD7.LRxx-
P5 Register
Number
Modbus
Holding
Register
Number
Example for
value stored
on the PCD
register of
the PCD7.
LRxx-P5
PCD 1/2/3
Register
Number on
the Modbus
client
PCD 1/2/3
register content if
value is stored as
16 bit unsigned
PCD 1/2/3 register
content if value is
stored as 16 bit
signed
PCD 1/2/3
register content if
value is stored as
32 bit
PCD 1/2/3
register content if
value is stored as
32 bit swapped
PCD Reg 0
HR0 /
HR1
11112222
hex
PCD Reg
00001111
hex
00001111
hex
11112222
hex
22221111
hex
PCD Reg 1
HR2 /
HR3
33334444
hex
PCD Reg+1
00002222
hex
00002222
hex
33334444
hex
44443333
hex
PCD Reg 2
HR4 /
HR5
55556666
hex
PCD Reg+2
00003333
hex
00003333
hex
55556666
hex
66665555
hex
PCD Reg 3
HR6 /
HR7
77778888
hex
PCD Reg+3
00004444
hex
00004444
hex
77778888
hex
88887777
hex
PCD Reg 4
HR8 /
HR9
9999AAAA
hex
PCD Reg+4
00005555
hex
00005555
hex
9999AAAA
hex
AAAA9999
hex
PCD Reg 5
HR10 /
HR11
BBBBCCCC
hex
PCD Reg+5
00006666
hex
00006666
hex
BBBBCCCC
hex
CCCCBBBB
hex
PCD Reg 6
HR12 /
HR13
DDDDEEEE
hex
PCD Reg+6
00007777
hex
00007777
hex
DDDDEEEE
hex
EEEEDDDD
hex
PCD Reg 7
HR14 /
HR15
FFFF1111
hex
PCD Reg+7
00008888
hex
00008888
hex
FFFF1111
hex
1111FFFF
hex
PCD Reg 8
HR16 /
HR17
22223333
hex
PCD Reg+8
00009999
hex
00009999
hex
22223333
hex
33332222
hex
PCD Reg 9
HR18 /
HR19
44445555
hex
PCD Reg+9
0000AAAA
hex
0000AAAA
hex
44445555
hex
55554444
hex
PCD Reg 10
HR20 /
HR21
66667777
hex
PCD Reg+10
0000BBBB
hex
0000BBBB
hex
66667777
hex
77776666
hex
PCD Reg 11
HR22 /
HR23
88889999
hex
PCD Reg+11
0000CCCC
hex
0000CCCC
hex
88889999
hex
99998888
hex
PCD Reg 12
HR24 /
HR25
AAAABBBB
hex
PCD Reg+12
Untouched
Untouched
Untouched
Untouched