The Setting ‘COMx - SysLibCom’¶
Note
At AC500-eCo CPUs PM55x and PM56x, the interface COM2 cannot be configured as SysLibCom mode.
As of Control Builder version V1.2 and firmware version V1.2.0 the protocol
- ‘COMx - SysLibCom’
is available.
If the protocol ‘COMx - SysLibCom’ is selected for the serial interface COMx, the interface is prepared for operation with the blocks contained in the library “SysLibCom.lib” and the according protocols.
The library SysLibCom.lib contains the following functions:
| Function | Meaning | Note |
| SysComClose | Closes an interface | |
| SysComGetVersion2300 | Internal version synchronization | Only internal |
| SysComOpen | Opens an interface | |
| SysComRead | Reads data from an interface | |
| SysComSetSettings | Parameterization of an interface | |
| SysComSetSettingsEx | Extended parameterization of an interface | Currently not supported |
| SysComWrite | Write data to an interface |
Note
All blocks in the “SysLibCom.lib” library are functions. The blocks are processed until the according action is completed or processing is aborted due to a possibly set timeout. During sending, the block waits, for example, until the characters have been actually output.
This can cause the suspension of the task in case of too small task cycle times!
The interface is initialized in the PLC configuration according to the defined settings when starting the PLC, after a download or after a reset. The following settings are possible:
| Parameter | Default value | Value | Meaning |
| Enable login see remark 1 | Disabled | Disabled | There is no check with regard to the Control Builder login telegram. |
| Enabled | Telegrams received are checked with regard to the Control Builder login sequence. If the sequence is detected, the protocol setting is changed to ‘Online access’. | ||
| RTS control see remark 2 | None | None | No RTS control (direction control, not for PM55x and PM56x) |
| telegram | RTS control activated (absolutely necessary for RS 485!) |
||
| TLS see remark 2 | 0 | 0…65535 | Carrier lead time in [ms] (TLS > CDLY) |
| CDLY see remark 2 | 0 | 0…65535 | Carrier delay time in [ms] (CDLY <= TLS) |
| Character timeout see remark 3 | 0 | 0…65535 | Character timeout in characters (must be 0 if Telegram ending selection = Character timeout) |
| Telegram ending selection see remark 3 | None | None | No telegram ending identifier |
| String (check receive) | 2 characters, e.g. <CR><LF> (16#0d, 16#0a -> 16#0d0a) in parameter “Telegram ending value” Setting not recommended! |
||
| Telegram length | Telegram ending identifier set by telegram length Setting not recommended! |
||
| Duration | Telegram ending identifier set by time Setting not recommended! |
||
| Character timeout | Telegram ending identifier set by character timeout | ||
| Telegram ending character see remark 3 | 0 | 0…1 | Number of end characters in case of telegram ending selection “String” |
| Telegram ending value see remark 3 | 0 | 0…65535 | Telegram ending identifier value for settings “Duration”, “Character timeout” and “String” |
| Handshake | None | None | No handshake |
| RTS/CTS | Hardware handshake | ||
| XON/XOFF | Not yet implemented | ||
| 3964R master | Not yet implemented | ||
| 3964R slave | Not yet implemented | ||
| Baudrate | 19200 | 300 1200 4800 9600 19200 38400 57600 115200 125000 187500 |
Character length in bits/s |
| Parity | None | None | No parity check |
| Odd | Odd parity | ||
| Even | Even parity | ||
| Mark | Parity bit := TRUE | ||
| Space | Parity bit := FALSE | ||
| Data bits | 8 | 5, 6, 7, 8 | Character length in bits/character |
| Stop bits | 1 | 1, 2 | Number of stop bits |