Can I detect the CTS signal on port 3 of a PCD3.M5340 (in RS422 mode)?

FAQ #101170

 

With firmware version 1.10.15 and later, it is possible reading the CTS signal from port 3 in case RS422 is used on this port. The CTS signal can be read by executing the SICL instruction (it is also possible if the port is assigned and if the port is not assigned).
Additionally, it is possible writing the RTS and the COM signal using the SOCL instruction (again, only if RS422 is used).

Remark
Please note that the CTS does not exist on RS485 and therefore it can not be read, either.

 

Port

Type

Mode

Assigned (SASI)

SICL

SOCL

RS-232

RS-422

RS-485

MC 0

MC 1

MC 2

MC 4/5

0 CTS

1 DSR

2 DCD

0 RTS

1 DTR

2 COM

# 0

-

-

-

No

-

-

-

yes

-

# 1

No

-

-

-

yes

# 2

-

-

-

-

-

No

-

-

-

-

-

-

yes

-

-

-

-

-

-

# 3

-

*

*

*

-

No

*

-

-

-

-

-

yes

*

-

-

*

-

*

# 1xx

No

-

-

-

yes

*) HW dependant (only on PCD3.M5340)