Saia-Burgess Controls AG
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Assembly and operating instructions PCD7.H104D
PCD7.H104D, S pulse counter with Modbus interface, Pic. 1
English
4 319 5152 0C 03.2017 Subject to change without notice
English
R Read Write Description Value / Unit
01 x FW-Version Ex: «10» = FW 1.0
02 x Number of supported registers will give «43»
03 x Number of supported ags will give «0»
04–05 x Baudrate [BPS] Ex: Baudrate High = 1, Baudrate Low = 496641 x 65536
+ 49664 = 115’200 bps
06 x Not used will give a «0»
07 x Type/ASN function will give «PC»
08 x Type/ASN function will give «D7»
09 x Type/ASN function will give «H1»
10 x Type/ASN function will give «04»
11 x Type/ASN function will give a «D»
12 x Not used will give a «0»
13 x Not used will give a «0»
14 x Not used will give a «0»
15 x HW Version Ex: «10» = HW 1.0
16–17 x Serial number Unique 32 bits serial number
18 Not used will give a «0»
19 x Not used will give a «0»
20 x Not used will give a «0»
21 x Not used will give a «0»
22 x Status «0» = No problem
«1» = Problem with last communication request
23 x Timeout Response timeout [ms]
24 x Address Modbus 1–99
25 x Not used will give a «0»
26 x Not used will give a «0»
27 x Not used will give a «0»
28–29 x x Counter S01 Ex: Counter S01 High=13. Counter S01 Low=60383
13 x 65536 + 60383 = 912351
Counter S01 = 912351/2000 = 456.2 kWh
30–31 x x Counter S02 Ex: Counter S02 High=13. Counter S02 Low=60383
13 x 65536 + 60383 = 912351
Counter S02 = 912351/2000 = 456.2 kWh
32–33 x x Counter S03 Ex: Counter S03 High=13. Counter S03 Low=60383
13 x 65536 + 60383 = 912351
Counter S03 = 912351/2000 = 456.2 kWh
34–35 x x Counter S04 Ex: Counter S04 High=13. Counter S04 Low=60383
13 x 65536 + 60383 = 912351
Counter S04 = 912351/2000 = 456.2 kWh
36 x x Impulses per unit for S01 Ex: 2000 = 2000 Imp/kWh
37 x x Impulses per unit for S02 Ex: 2000 = 2000 Imp/kWh
38 x x Impulses per unit for S03 Ex: 2000 = 2000 Imp/kWh
39 x x Impulses per unit for S04 Ex: 2000 = 2000 Imp/kWh
40 x x ID for S01 User dened identication number
41 x x ID for S02 User dened identication number
42 x x ID for S03 User dened identication number
43 x x ID for S04 User dened identication number
Register
For double registers (4–5, 16–17, 28–29, 30–31, 32–33, 34–35) the high registeris sent rst (big_Endian).
Counters (28–29, 30–31, 32–33, 34–35) can be reset by writing 0 in both registers.
Description
The S-Modbus coupler module is a device for the collec-
tion of S pulses. With this module the consumption data
of any measurement device with a S output becomes bus
capable and can be accessed by every Saia PCD through the
Modbus as well as to all master of Modbus.
The addressing of 1 to 99 and the identication of the
module will be done with the two rotary switches (× 1 / ×
10) on the front side. Up to 99 S-Modbus coupler modules
can be connected on the same bus simultaneously.
Technical Data (Pic. 3)
Nominal voltage Un 230 VAC (-20/+15%)
Current draw < 12 mA
Power draw < 3 W
Operation indicator Green LED (ON)
Comm. indicator Red LED for bus activity
Operating temperature
–25°C … +55°C
DIN 40050 Housing IP 40
protection type Terminals IP 20
Screw terminals 0.5 … 2.5 mm
2
Housing dimensions W=35, H=85, D=58 mm
Special characteristics Electrically isolated supply
Important instructions
Safety
Check compliance with nominal voltage before commis-
sioning the device (see type label). Check that connection
cables are free from damage and that, when wiring up the
device, they are not connected to voltage.
Cleaning
Modules can be cleaned with a dry cloth, or a cloth
moistened with a soap solution. Never use corrosive
substances, or products containing solvents.
Maintenance
S-Modbus modules are maintenance-free. If damaged
during transportation or storage, no repairs should be
undertaken by the user.
Guarantee
Opening the module invalidates the guarantee.
Switch for line termination resistors (Pic. 2)
If the Modbus module is used in the bus as last device,
then the sliding switch «RS-485 Terminate» need to be in
position «On».
S-Inputs
■
complies with S standard 62053-31
■
counts pulses when resistance
R < 800 Ω for a '0' and
R > 1 MΩ for a '1'
Voltage max. (GND-S) 13 VDC
Current max. (for 0 Ω) 6 mA
Pulses-level low min. 30 ms
Pulses-level high min. 30 ms
Frequency max. 17 Hz
Technical data Modbus
Bus system Modbus, RTU according to IDA specication
Transmission rate 2400-4800-9600-19 200-38 400-57 600-115 200.
The transmission baudrate and the parity are automatically detected
Transmission mode Even parity: 8 data bits, 1 stop bit
Odd parity: 8 data bits, 1 stop bit
No parity: 8 data bits, 2 stop bits
Bus length (max.) 1200 m (without repeater)
Response time: Write: 30 ms
Read: 20 ms
■
Default baudrate: 19 200 BPS, 8 data bits, 1 stop bit, even parity
■
The communication is ready 10 s after the Power on
■
For a description of the used Registers please look at the register page
Data transmission
■
Only «Read Holding Registers [03]/ Write Multiple Registers [16]» instructions are recognized.
■
Up to 20 registers can be read and two registers can be written at a time.
■
The device supports broadcast messages.
■
In accordance with the Modbus protocol, a register R is numbered as R - 1 when transmitted.
■
The device has a voltage monitoring system. In case of voltage loss, registers are stored in EEPROM
(transmission rate, etc.)
Exception Responses
■
ILLEGAL FUNCTION [01]: The function code is not implemented.
■
ILLEGAL DATA ADDRESS [02]: The address of some requested registers is out of range
or more than 20 registers have been requested.
■
ILLEGAL DATA VALUE [03]: The value in the data eld is invalid for the referenced register.
Change the Modbus address direct on device
■
The Modbus address can be set with the rotary switches.
■
The address is set max. 10 s as soon as the rotary switches no loger were rotated.
Note:
Modbus don’t allow a device address «0». Nevertheless if it is set, the PCD7.H104D module isn’t communicating via the
bus and the the two LEDs are ashing each with 1 Hz, however the S0 pulses are counted