Mitsubishi Electric Procon MOD-IP/50 User manual

Procon
MOD-IP/50
Installation
and
User Guide
MITSUBISHI ELEC
TRIC

1
The Procon MOD-IP/50 unit allows a Modbus building management
system (BMS) to monitor and control air-conditioning units attached to a
Mitsubishi G-50A, GB-50A or AG-150 central controller (referred to as
‘G-50’ from now on).
The Modbus registers can be accessed via the serial comms
interface using Modbus RTU on RS232 or RS485, or via the network
interface using Modbus/TCP.
Depending on the air-conditioning configuration within the G-50, up to
50 groups can be monitored / controlled. The error state of up to 50
OC/BC units can also be monitored.
1. Product Overview
RS232/RS485
Procon
MOD-IP/50
G-50A
Outdoor
Units
Indoor Units
Modbus
BMS
System
Cat-5 ‘crossover’
cable
Serial Comms
cable
(Not supplied)
Fig.1a
System Configuration
Example Using
RS232/RS485
2
Modbus / TCP
Procon
MOD-IP/50
G-50A
Ethernet
Hub / Switch
Outdoor
Units
Indoor Units
Modbus
BMS
System
Fig.1b
System Configuration
Example Using
Modbus/TCP
1.1 Supplied Parts
No. Part Name Quantity
1 Procon MOD-IP/50 1
2 Cat-5 ‘Straight Through’ Patch Lead 1
3 Cat-5 ‘Crossover’ Patch Lead 1
4 Din-Rail Clips 2
5 Self-Tapping Screws for Din-Rail Clips 4
6 Installation Manual 1

3
2.1 Ethernet
The Procon MOD-IP/50 is a 10Base-T half duplex device and needs
to be connected to the G-50 and the local network (if Modbus/TCP is
being used). Fig.1b shows the use of a hub / switch ( not supplied ) to
make the connections, but the Procon unit and the G-50 could just as
easily be connected directly to the network.
See Appendix C for port configuration.
12/24v AC
10Base-T
Ethernet
Serial Comms
Port
Reset
Button
Power
Supply
Enable
Link
To
Ethernet
RS485-B RS232 Tx
Common
RS232 Rx
N/C
Can also be used to
upgrade the
firmware
.
RS485-A
2. Connection Details
Fig.2 Connection Details
All electrical work should be carried out by a competent person
and wiring must be in accordance with the national electrical
installation regulations.
Note: a) The Procon MOD-IP/50 and the G-50 require separate
IP addresses which must be on the same subnet.
b) The MOD-IP/50 does not support Auto-Negotiation.
4
2.2 Serial Comms Port
This connector provides access to the modbus registers using RS232
or 2-wire RS485. The RS232 port can also be used for upgrading the
firmware. See Appendix C for port configuration.
The RS485 interface can be used on a compatible serial
communications network shared by multiple RS485 devices. The
Slave Address Offset parameter must be set to prevent multiple units
using the same slave numbers.
It is recommended that screened twisted-pair cable is used.
RS485-A is the non-inverting signal and is also named RS485+
RS485-B is the inverting signal and is also named RS485-
Common should be connected to the cable screen.
Serial Comms
Port
Pin 5
Pin 3
Pin 2
To PC
Comm Port
9 PIN D
-
SUB FEMALE
Fig.3a RS232 Comms Lead Wiring Diagram
Serial Comms
Port
RS485-B
RS485-A
RS485
network
Common
A
B
Fig.3b RS485 Comms Wiring Diagram

5
2.3 Enable Link
Allows a normally-closed volt-free contact to set or reset the ‘Forced-
Off’ feature in the G-50. While the ‘Forced-Off’ feature is enabled, all
air-conditioning units are switched off and all remote-controllers are
disabled.
Upon detection of the open contact, the Procon unit sends the
‘Forced-Off’ Set command to the G-50, and resends at 5 seconds
intervals while the contact is open.
As soon as the contact closes, the Procon unit sends the ‘Forced-Off’
Reset command to the G-50 once only. This ensures that any
subsequent ‘Forced-Off’ commands sent via the Modbus BMS
system are not overridden.
2.4 Power Supply
The Procon MOD-IP/50 will accept either 12v or 24v AC and has a
consumption of 8VA. The unit is shipped setup for 24v AC. The
internal fuse is rated T500mA.
THIS EQUIPMENT MUST BE EARTHED
24v
AC
12
v
AC
Disconnect the supply and remove the top cover. Fit the 2 shorting
links and the fuse in the appropriate positions detailed above.
Shorting
Links
Fuse
Changing The Supply Voltage
Note: The Procon MOD-IP/50 comes supplied with a wire
link across the Enable Link terminals.
6
3. Air-Conditioning Group Configuration
The groupings set up in the G-50 determine which unit addresses
can accept commands from the BACnet BMS system. The group
number is defined as ‘the lowest indoor unit address within the
group’. This then becomes the ‘master’ address for the group, and is
the only address within that group than can accept commands.
The other units within a group can be classed as ‘slave’ units and
contain the same status parameter values as the ‘master’, apart from
the Error Code, which is unique to each unit.
In the example above, addresses 01, 03, 06 and 08 are the
‘master’ units, and 02, 04, 05 and 07 are the ‘slave’ units.
IC
01
*
IC
02
IC
03
*
IC
04
IC
05
IC
06
*
IC
07
IC
08
*
G-50
Group
01
Group
03
Group
06
Group
08
M-NET
Fig.4 Grouping Example
Note: Attempting to write a command to a ‘slave’ unit will have no
effect.

7
4. Unit Operation
At startup and provided a network cable is attached (the ‘Ethernet
Link’ led should be lit), the Procon unit attempts to establish a
connection with the G-50 using the appropriate IP address. Should the
G-50 not be found, then a ‘watchdog’ feature will periodically reset the
Procon unit, indicated by the ‘Device Reset’ led lighting up for 2
seconds.
Once established, the G-50 is interrogated to determine the number
of active groups. At this point the Procon unit begins its polling
sequence, requesting the Mnet status, the status of all active groups,
and the list of all current alarms. This sequence is continually repeated,
with new control settings from the BMS transmitted to the G-50 by
interleaving into the poll sequence.
If the BMS is using RS232 or RS485 and provided a valid modbus
message is received, then the ‘Serial Tx’ led will light to indicate that a
Modbus reply has been sent. If Modbus/TCP is being used then there
will be increased activity from the ‘Ethernet Tx’ led.
The Global parameter ‘G50 Comms Status’ can be read via Modbus
to determine if the Procon unit is communicating with the G-50.
The time required to complete the polling sequence will depend on
the number of active groups programmed in the G-50 and the
frequency of new control settings sent via Modbus.
8
5. Modbus Registers
The Procon MOD-IP/50 behaves as 20 modbus slaves, each with 60 registers
(Offset = 0 to 59).
By default the slave addresses are 1 – 20 but an address offset can be
applied to provide ranges 21-40, 41-60, 61-80, 81-100, up to 201-220.
This is useful to prevent address clashing when the Procon unit is attached to
a communications network containing multiple Modbus devices.
The Procon MOD-IP/50 maps the data from the air conditioner units into
Modbus registers accessed by two Modbus parameters ‘Slave No.’ and
‘Offset’.
All slave numbers referred to in this document assume the default
addresses - Add the ‘offset’ value where applicable.
Slaves 1 to 16 each represent 3 units, and slave 17 represents 2 units, with
‘Unit C’ of slave 17 used for various system settings. See Section 5.4 for
details.
Each slave is organised as follows:
General Information Extended Information
Unit A Unit B Unit C Unit A Unit B Unit C
Offset 0 Offset 10 Offset 20 Offset 30 Offset 40 Offset 50
Examples : 1) To read the current fan speed of unit 8, the required modbus
message would contain Slave 3, Function 3, Offset 14.
2) To read the current mode of unit 48, the required modbus
message would contain Slave 16, Function 3, Offset 23.
General Information for a single unit
Register Offset Stored Value
0 Return Air Temp
1 Error Code
2 Setpoint (Read)
3 Mode (Read)
4 Fan Speed (Read)
5 Setpoint (Write)
6 Mode (Write)
7 Fan Speed (Write)
8 On/Off (Read)
9 On/Off (Write)
Extended Information for a single unit
Register Offset Stored Value
0 Air Direction (Read)
1 Air Direction (Write)
2 Inhibit (Read)
3 Inhibit (Write)
4 Ventilation (Read)
5 Ventilation (Write)
6 Filter Reset (Read)
7 Filter Reset (Write)
8 Unused
9 Unused

9
On/Off, Inhibit & Filter Reset can also be accessed via ‘Coils’. Each slave
contains 18 coils, organised as follows:
Coil Offset Definition
0 Unit A On/Off (R)
1 Unit A On/Off (W)
2 Unit B On/Off (R)
3 Unit B On/Off (W)
4 Unit C On/Off (R)
5 Unit C On/Off (W)
6 Unit A Inhibit (R)
7 Unit A Inhibit (W)
8 Unit B Inhibit (R)
9 Unit B Inhibit (W)
10 Unit C Inhibit (R)
11 Unit C Inhibit (W)
12 Unit A Filter Reset (R)
13 Unit A Filter Reset (W)
14 Unit B Filter Reset (R)
15 Unit B Filter Reset (W)
16 Unit C Filter Reset (R)
17 Unit C Filter Reset (W)
5.1 OC/BC Error Codes
Slave 18 contains the error codes for units 51 to 80.
Slave 19 contains the error codes for units 81 to 100.
5.2 Additional Register Usage
Slave Offset Setting
17 20 Mnet Status
17 21 G-50 Status
17 22 Global Forced-Off (Read)
17 23 Global Forced-Off (Write)
19 20 Firmware Number
19 21 Firmware Version
19 22-27 MAC Address
20 7-10 IP Address
20 11-14 Gateway Address
20 15-18 Subnet Mask
20 20 Slave Address Offset
20 21 G-50 IP Address
10
5.3 Parameter Settings
Parameter Settings Notes
Return Air Temperature 0oC to 99oC
Error Code 4 digit error code where
8000 = ‘No Error’
Setpoint Temperature Air Conditioner :
Cool/Dry : 19oC to 30oC
Heat : 17oC to 28oC
Auto : 19oC to 28oC
Boiler :
Heating : 30oC to 45oC
Heating ECO : 30oC to 45oC
Hot Water : 30oC to 70oC
Anti-Freeze : 10oC to 45oC
Cooling : 10oC to 30oC
Operation Mode 00: Fan (Draft)
01: Cool
02: Heat
03: Dry
04: Auto
05: (Not Used)
06: AutoCool
07: AutoHeat
Not settable
08: Heat Recovery
09: LC_Auto
10: Bypass
Lossnay Only
11: Heating
12: Eco-Heating
13: Hot-Water
14: Anti-Freeze
15: Cooling
Heat-pump boiler only
Fan Speed 00: Low
01: Mid2 (Low Medium)
02: Mid1 (High Medium)
03: High
On/Off 00: Off
01: On
Air Direction 00: Horizontal
01: Mid1
02: Mid2
03: Vertical
04: Swing
Local Inhibit 00: Not inhibited
01: Inhibited
Ventilation 00: Off
01: Low
02: High
Lossnay / OA units only
Filter Sign 00: Filter Sign Off
01: Filter Sign On
Cleared by writing 00 to
the Filter Sign register or
coil.

11
Parameter Settings Notes
OC / BC Error Code 4 digit error code where
8000 = ‘No Error’
Mnet Status 00: Initialising
01: OK
See Appendix D
G50 Comms State 00: Not found
01: OK
See Appendix D
Global Forced-Off 00: Disabled
01: Enabled
See Appendix D
12
5.4 Modbus Table Overview
Coil Base Offsets
Unit Address Slave General Info
Base Offset
Extended Info
Base Offset On/Off Inhibit Filter Sign
1 1 0 30 0 6 12
2 1 10 40 2 8 14
3 1 20 50 4 10 16
4 2 0 30 0 6 12
5 2 10 40 2 8 14
6 2 20 50 4 10 16
7 3 0 30 0 6 12
8 3 10 40 2 8 14
9 3 20 50 4 10 16
10 4 0 30 0 6 12
11 4 10 40 2 8 14
12 4 20 50 4 10 16
13 5 0 30 0 6 12
14 5 10 40 2 8 14
15 5 20 50 4 10 16
16 6 0 30 0 6 12
17 6 10 40 2 8 14
18 6 20 50 4 10 16
19 7 0 30 0 6 12
20 7 10 40 2 8 14
21 7 20 50 4 10 16
22 8 0 30 0 6 12
23 8 10 40 2 8 14
24 8 20 50 4 10 16
25 9 0 30 0 6 12
26 9 10 40 2 8 14
27 9 20 50 4 10 16
28 10 0 30 0 6 12
29 10 10 40 2 8 14
30 10 20 50 4 10 16
31 11 0 30 0 6 12
32 11 10 40 2 8 14
33 11 20 50 4 10 16
34 12 0 30 0 6 12
35 12 10 40 2 8 14
36 12 20 50 4 10 16
37 13 0 30 0 6 12
38 13 10 40 2 8 14
39 13 20 50 4 10 16
40 14 0 30 0 6 12
41 14 10 40 2 8 14
42 14 20 50 4 10 16
43 15 0 30 0 6 12
44 15 10 40 2 8 14
45 15 20 50 4 10 16
46 16 0 30 0 6 12
47 16 10 40 2 8 14
48 16 20 50 4 10 16
49 17 0 30 0 6 12
50 17 10 40 2 8 14

13
6. Special Functions
This section describes functions which can only be enabled via switches on
the MOD-IP/50 circuit board.
6.1 Function Descriptions
Bank A-1: Auto-Detail
Off: Mode status reported as ‘Auto’, regardless of
which ‘Auto’ mode is active.
On: ‘AutoHeat’ or ‘AutoCool’ are reported, if active.
( This is the factory default setting ).
Bank A-2: Not used at present.
12
A
Bank A
1: Auto-Detail
2: Unused.
On
Off
Disconnect the supply before removing the top cover
Fig.5 Special Function Switches
14
Appendix A : Physical Dimensions
144mm
104mm
34mm
10Base-T
Ethernet
Serial Comms
Port
Reset
Button
Power
Supply
Enable
Link
A
A
A
A
B
B
B
B
Fig.6 Dimensions
The holes marked ‘A’ should be used when mounting the enclosure
on a back panel.
The holes marked ‘B’ can be used to attach the supplied din-rail
clips.

15
Appendix B : Reset Button
The Reset button has 2 functions :
1) To restore various internal settings to their factory defaults,
2) To force the unit into ‘bootloader’ mode ready for a firmware update.
Function 1 – Restore Factory Defaults
There are 2 levels to this function.
Level 1 : With the unit already ON, press and hold in the reset button.
After approximately 5 seconds the ‘Device Reset’ light will start
to flash slowly. Releasing the reset button while the light is
flashing slowly will activate Level 1, and then reset the unit.
Settings Restored: None
Level 2 : With the unit already ON, press and hold in the reset button.
After approximately 5 seconds the ‘Device Reset’ light will start
to flash slowly. Continue to hold in the reset button until the
light starts to flash rapidly. Releasing the reset button while the
light is flashing rapidly will activate Level 2, and then reset the
unit.
Settings Restored:
IP Address 192.168.1.11
Gateway Address 192.168.1.11
Subnet Mask 255.255.255.0
G50 IP Address 192.168.1.1
Slave Address Offset 0
16
Function 2 – Enable ‘Bootloader’ Mode
Bootloader mode allows the firmware to be updated from a PC.
Press and hold in the reset button while powering up the unit. Continue to
hold in the reset button for approx. 5 seconds, until the ‘Device Reset’ light
begins to flash ( Long ON, Short OFF ). The unit is now in bootloader mode.
Note: Enabling the bootloader in this way is only necessary if the
firmware update software fails to automatically put the unit into
bootloader mode.

17
Appendix C : Port Configurations
RS232/RS485 interface
- Modbus RTU
- 9600 baud, 8 data bits, no parity, 1 stop bit
Network interface
- Modbus/TCP
- TCP port 502
- 10base-T half-duplex
- Auto-negotiation not supported
Modbus Functions accepted
- Fn 1 Read Coils
- Fn 3 Read Holding Registers
- Fn 5 Write Single Coil
- Fn 6 Write Single Register
- Fn 16 Write Multiple Registers
18
Appendix D : Global Parameters
Global Parameter Description
Mnet Comms Status Provides an indication of the communication status
between the G-50 and the Mitsubishi M-Net network.
00 : M-Net Initialising
01 : M-Net OK
Note: While M-Net is initialising, the air-conditioning is
effectively offline to control and monitoring
requests.
G50 Comms Status Provides an indication of the communication status
between the Procon MOD-IP/50 and the G-50.
00 : G-50 not responding
01 : G-50 comms OK
Note: ‘G-50 not responding’ either means the G-50 is
switched off or is not connected to the network.
Global Forced Off Enables and disables the Global Forced-Off command.
This setting allows the BMS to provide functionality
equivalent to the ‘Enable Link’ described in section 2.3