xxii
Conformance to EC Directives 6
• When the Serial Gateway is executed during protocol macro execution,
the communications sequence contents and the FINS command recep-
tion timing may suspend step transition of the communications sequence
(when the next step does not contain the RECEIVE command, the Serial
Gateway will be executed by interrupting the sequence before the next
step, and the step transition will be suspended).
Use the Serial Gateway send start timeout function to monitor at the
source of the FINS command whether step transition in the communica-
tions sequence has been suspended due to execution of the Serial Gate-
way. If the converted command does not start to be sent within the set
time, either retry executing the FINS command or change the communi-
cations sequence.
• When using 2-wire RS-422A/485 communications in Protocol Macro
Mode, set only modem controls for the send control parameters, and do
not use RS/CS flow controls.
• The following operations will result if the Serial Gateway is executed either
using a pre-Ver. 1.2 Board/Unit or using a Ver. 1.2 or later Unit/Board with-
out Serial Gateway or protocol macro mode set for serial communications
at the serial port.
• If either NT Link or loopback test mode is used for serial communica-
tions, or if protocol macro mode is used with a pre-Ver. 1.2 Board/Unit,
an undefined command response will be returned (end code: 0401
hex).
• If Host Link mode is used for serial communications, the message will
be converted into a FINS command using Host Link slave-initiated
communications and transferred (this will mainly result in a response
timeout being returned, depending on the remote device (end code:
0205 hex))
• If a no-protocol instruction is sent to a pre-Ver. 1.2 Board/Unit or the serial
port of a Board/Unit with Unit Ver. 1.2 or later using a serial communica-
tions mode other than no-protocol mode, the following operations will
occur.
• If TXD(236)/RXD(235) is sent to the Board, Auxiliary Area bit A424204
(Inner Board Service Failure Flag) will turn ON.
• If TXDU(256)/RXDU(255) is sent to the Unit and the serial communi-
cations mode is set to protocol macro, NT Link, loopback test, or Serial
Gateway mode, an undefined command error (end code: 0401 hex)
will be returned.
If the serial communications mode is set to Host Link mode and the in-
struction will be converted to a slave-initiated function FINS command
and transferred. (Depending on the remote device, a response timeout
(end code: 0205 hex) is likely to be returned.)
6 Conformance to EC Directives
6-1 Applicable Directives
•EMC Directives
• Low Voltage Directive
6-2 Concepts
EMC Directives
OMRON devices that comply with EC Directives also conform to the related
EMC standards so that they can be more easily built into other devices or the
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