1. Arctic IEC-104 Gateway
Jari Lahti, CTO

2. Arctic IEC-104 Gateway
IEC to IEC communication gateway
Conversion between IEC-104 and IEC-101
Local IEC-101 polling of Class 1 and Class 2 events
One RS-232 and one RS-232/422/485 port up to bps
Internal Ethernet and GSM/GPRS wireless network interface
Secure communication with internal VPN and firewall
GPRS operator independent static IP addressing with Viola M2M Gateway
Packet compression for slow-speed links
I/O extension option (=Arctic RTU)
DIN rail mounting option
IEC-104 OVER GPRS
IEC-101 OVER RS-232

3. Wireless Feeder Automation
IEC-101 OVER RS-232
Viola M2M Gateway
IEC-104 OVER SECURE VPN TUNNEL
GPRS
SCADA
Arctic IEC-104 Gateway
IEC-101 Devices (Feeder Controllers)
IEC-104

4. Physical Connections GPRS Antenna -FME connector Power input -6-26 VDC
RS 1 (RS-232)
-Console or plain data
Console switch
-Defines the mode of RS 1 (console or data)
RS 2 (RS-232/422/485)
-IEC-101 data
RS 2 DIP switches
-RS-232 / RS-422 / RS-485
-Full (485) / Half (422) duplex
-Bias on/off
-Termination on/off
GPRS Antenna
-FME connector
Power input
-6-26 VDC
Ethernet
-10/100 Base-T

5. DIP Switches and RS2 pinout
DIP switches control the operation of RS2
RS2 pinout (standard male DB-9)
RS2 operation in RS-232 mode (standard DTE) and in RS-422/485 mode

6. IEC-101 Serial settings Serial speed Data bits Parity
1200
2400
4800
9600
19200
38400
57600
Data bits
5,6,7,8
Parity
None, Even, Odd
HW (CTS/RTS) Flow control
Yes/No

7. Network settings Network protocol TCP (standard IEC-104) UDP
Network port to listen
The TCP or UDP port the Arctic IEC-104 Gateway listens for incoming IEC-104 connections
2404 is the standard port
Network idle timeout
If there is no communication on open connection during defined interval the Arctic IEC-104 Gateway closes the connection
New connection priority
Defines are new connections accepted if there is a connection already
Setting Yes enables new connection to have higher priority and the existing connection is closed

8. IEC-104 Settings TX window size (k) RX window size (w)
how many IEC-104 packets Arctic sends to IEC-104 master before waiting acknowledgement
RX window size (w)
how many IEC-104 packets Arctic receives from IEC-104 master before sending acknowledgement
I frames TX timeout (t1)
how many seconds to wait acknowledgement from IEC-104 master
I frames RX timeout (t2)
how many seconds to wait from last received IEC-104 packet before sending acknowledgement
Link test interval (t3)
interval for sending IEC-104 link test packets
Suspended timeout
if the IEC-104 link is on suspendet state over defined timeout Arctic will close the link
Max sequence number
defines the maximum sequence number used on IEC-104 communication
Cause of transmission length
size of IEC-104 Cause of transmission field length in bytes
Common address length
size of IEC-104 Common address field length in bytes
Info object address length
size of IEC-104 Information object address field length in bytes
NOTE
(w) must be smaller than (k) (2/3 of k)
(t1) must be longer than (t2)
w, k, t1 and t2 should be same on both ends (SCADA, Arctic) of IEC-104 connection
(t3) should be smaller on Arctic than on SCADA

9. Local polling of events
The Arctic IEC-104 gateway polls locally the IEC-101 device for Class 1 and Class 2 events
events are sent when they occur
no need to perform fast polling over GPRS
slow periodic link test frames can be used
Local IEC-101 polls
Send when events

10. IEC-101 Settings Slave link address Link address field length
the link address of IEC-101 slave
Link address field length
the size of IEC-101 link address field in bytes
1 or 2
Event poll interval
the interval of polling Class 1 or Class 2 events from IEC-101 slave in multiple of 100 ms
Link test interval
the interval of testing IEC-101 link status in multiple of 100 ms
Keep link open
defines is the IEC-101 link kept open by Arctic even when there is no active IEC-104 connection
the events are still not polled untill the IEC-104 connection is active
Reply header timeout
timeout of waiting reply to start from IEC-101 slave
Reply end timeout
timeout of waiting reply to end from IEC-101 slave
Retry limit
how many times to retry a command to IEC-101 slave
Cause of transmission length
size of IEC-101 Cause of transmission field length in bytes
Common address length
size of IEC-101 Common address field length in bytes
Info object address length
size of IEC-101 Information object address field length in bytes

11. ASDU Conversion
The Arctic IEC-104 Gateway supports ASDU level header length conversion
Cause of transmission length
Common address length
Information object address length
This is usually required because the header lengths typically differs between IEC-101 and IEC-104
It is possible to convert also ASDU types if the implementation differs between IEC-104 master and slave

12. ASDU Converter settings
Use ASDU converter
set Yes to allow conversion between IEC-101 and IEC-104 header field lengths
Use ASDU type replacer
set Yes to allow conversion between ASDU Original type and Applied type
Original type
original ASDU type to be searched if ASDU type replacer is enabled
Applied type
the ASDU defines is the type used to replace the original type if ASDU type replacer is enabled

13. Packet collector
The packet collector can be used to "collect" multiple IEC-104 packets to Arctic before sending them to IEC-104 master
This decreases the amount of used GPRS data because data is sent in single packet rather than in multiple packets
single TCP/IP header instead of multiple headers

14. Packet collector settings
Use packet collector
set yes to allow packet collector operation
Max bytes
Maximum bytes to collect before sending the packet
Max time
Maximum time to collect before sending the packet
Max packets
Maximum number of IEC-104 frames to collect before sending the packet
NOTE
If any of the triggers (Max bytes, Max time, Max packets) is reached the packet is sent

15. IO Extension
It is possible to equip Arctic IEC-104 Gateway with I/O extension board
8 DI
2 DO
These I/O pins can be used as an extension of IEC-101 slave address space
single IEC-104 connection is required to control the IEC-101 slave and Arctic IO extension
Arctic sends the I/O status as spontaneous events in case of General interrogation
All IO extension information is Single-point information without time tag
It is possible to send the Input status periodically as spontaneous events
The output pins can be controlled with Single command
I/O extension board is a manufacturing option

16. IO Pinout
Front View 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
PIN
SYMBOL
DESCRIPTION 1 V+
Vcc out, 50 mA 2
DI_1
Digital input, V 3
DI_2 4
DI_3 5
DI_4 6
DI_5 7
DI_6 8
DI_7 9
DI_8 10
DI_COM
Digital inputs referense input 11
DO_1A
Digital output pole 1, V, 50 mA 12
DO_1B
Digital output pole 2 13
DO_2A
Digital output pole 2, V, 50 mA 14
DO_2B 15
GND
GND output
Output circuit
Input circuit
NOTE
Input voltages below 2 V are detected as logic "0"
Input voltages between 5-60 V are detected as logic "1"

17. IO Extension settings Use IO extension board Common address
set Yes to enable IO extension
Common address
the IEC-104 common address of IO extension board
Number of inputs
number of digital inputs used
0-8
Inputs start address
The information object address of first digital input on IO extension board
Number of outputs
number of digital outputs used
0-2
Outputs start address
The information object address of first digital output on IO extension board
Reply end timeout
timeout of waiting reply to end from IEC-101 slave
Output short pulse duration
Defines the duration in 0.1 secs of output short pulse.
Output long pulse duration
Defines the duration in 0.1 secs of output long pulse
Paired outputs
Defines are the outputs controlled individually or are they controlled as paired outputs.
Forced output function
Defines the forced operation of outputs executed regardless the actual command data.
Send input status cyclic
Defines are the input pin status information sent cyclically when the IEC-104 connection is active
Cyclic interval
Defines the time interval in 0.1 secs of sending input status cyclical message
Inputs status are sent as spontaneous events
Send input state change event
Defines does the state change of input cause sending of spontaneous event.

18. Serial port RS1 The serial port RS1 can be used in two modes
Console mode - access Arctic command line with serial console
Data mode - transfer plain RS-232 data over network
The RS1 mode is controlled by Console Switch on Arctic front panel
Switch position in Console mode
Switch position in Data mode
When operating the console switch always turn Arctic OFF

19. RS 1 Serial Gateway