B&B Electronics WOP-2121V-N4AE - Manual - Manual (Page 440)

4 14
PM Designer Operation Manual
14-31
CHAPTER 14 USING MACROS
14.4.12. Communication Operation
EN_LINK
Format EN_LINK(P1,P2,P3) Data Type U
Function
Enables communication link P1 or sub-link P2 of communication link P1 when P3 is 1. Disables
the specified communication link or sub-link when P3 is 0.
P1 (I/C) The number of the communication link to be enabled or disabled.
P2 (I/C) The node address of the sub-link to be enabled or disabled. If the specified communication link
has no sub-link, this parameter is ignored. If the specified communication link has sub-links and
you want to enable or disable the link itself, set this parameter to 0.
P3 (I/C) To enable the specified communication link or sub-link, set this parameter to 1. To disable the
specified communication link or sub-link, set this parameter to 0.
Example 1
ENABLE_LINK( 1 , 20 , 0 ) /* Disable the sub-link, whose node address is 20, of communication
link 1. */
LINK_STS
Format P1 = LINK_STS(P2,P3 ) Data Type U
Function Gets the status of communication link P2 or the sub-link P3 of communication link P2 and saves
the result in P1.
P1 (I/C) The word to receive the status of the specified communication link or sub-link. The status is a
16-bit value. The following table lists the meaning of each status value.
Status Value Meaning Status Value Meaning
0 OK 14 Device busy
1 Overrun error 15 Unknown error
2 Break error 16 Link disabled
3 Parity error 17 Initialization failure
4 Framing error 18 Failed to send data
5 No response 19 Failed to receive data
6 Unrecognized
response 20 Failed to open connection
7 Timeout 21 Connection not ready
8 Inactive CTS 22 Invalid sub-link
9 Checksum error 23 Invalid COM port
10 Command rejected 24 Error
11 Invalid address 255 Condition uncertain
12 Invalid range 65535 Failed to get status
13 Invalid request
P2 (I/C) The number of the communication link.
P3 (I/C) The node address of the sub-link. If the specified communication link has no sub-link, this
parameter is ignored.
Example 1 $U100 = LINK_STS( 2 , 0 ) /* Get the status of communication link 2 and save it to $U100. */
Example 2 $U12 = LINK_STS( 1 , 128 ) /* Get the status of the sub-link, whose node address is 128, of
communication link 1 and save it to $U12. */