Danfoss AKA 245 Installation Guide download pdf (Page 22)

22 Installation guide RI8BP602 © Danfoss 10/2011 AKM/AK Monitor/AK Mimic

Appendix 3 - continued

Situation 1

Preparation of system for data communication

Objective

• All units of the data communication link must be started, so that

the system will be ready for programming.

Conditions

• New installation

• All controllers must be energised

• The data communication cable must be connected to all control-

lers

• The data communication cable must be installed in accordance

with the instructions “Data Communication Cable for ADAP-

KOOL® Refrigeration Controls” (literature No. RC0XA)

Procedure

1. Check that the data communication cable connections are cor-

rect:

a) H to H and L to L

b) That the screen is mounted at both ends and that the screen

does not touch the frame or other electric connections (not

either the earth connection, if there is one)

c) That the cable is correctly terminated, i.e. that the “ﬁrst” and

“last” controllers are terminated.

2. Set an address in each controller:

a) In AKC and AKL controllers the address is set by means of a

switch on the unit’s printed circuit

b) In AKA 245 gateway the address is set from control panel

AKA 21

• A master gateway gives address 125

• If there are several gateways on a network, you may only

energise one gateway at a time. Other-wise there will be a

conﬂict, because all gateways come factory-set with same

address

• Remember to set both network number (1) and address

(125).

• Set the gateway, so that it is deﬁned as a modem gateway

(MDM).

• Thereafter activate the function "Boot gateway".

3. Set the clock in AKA 245 master gateway’s address 125. (This is

the clock that sets the clocks in the other controllers).

4. Connect a modem, if applicable.

a) Connect modem and AKA 245 with a serial cable (standard

modem cable)

b) The supply voltage to the modem must be connected via

relay output DO1 on AKA 245 (reset function)

c) Connect the modem to the telephone network.

5. Check that the modem has been installed correctly before leav-

ing the plant. For instance by making a call to or from a central

PC.

Modem

Modem-gateway (1:125)

1:125

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