Communication Functions on M580 CPUs

Legacy Communication Functions Available on M580 CPUs

Legacy communication functions role:

Name	Role
DATA_EXCH	End any requests (Modbus, Umas …) to any Modbus slave via a communication module plugged in a local rack or in an EIO drop.
INPUT_BYTE	Receive an array of bytes on a character mode link of a BMX NOM module plugged in a local rack or in an EIO drop.
INPUT_CHAR	Receive a character string on a character mode link of a BMX NOM module plugged in a local rack or in an EIO drop.
PRINT_CHAR	Send a character string on a character mode link of a BMX NOM module plugged in a local rack or in an EIO drop.
READ_VAR	Read the value of one or more language objects via a communication module plugged in a local rack or in an EIO drop.
SEND_EMAIL	Send an email over an Ethernet port of a communication module plugged in a local rack (Ethernet modules cannot be plugged in an EIO drop).
WRITE_VAR	Write the value of one or more language objects via a communication module plugged in a local rack or in an EIO drop.

Other Communication Functions Available on M580 CPUs

Other communication functions role:

Name	Role
ETH_PORT_CTRL	Activate or deactivate a protocol.
EthPort_Control_MX	Enable or disable the configured Ethernet services.
GET_TS_EVT_M ⁽¹⁾	Get the time stamped data in a Modicon BMX ERT 1604T or BMX CRA ••••• module plugged in a local rack or in an EIO drop.
READ_PARAM_MX ⁽²⁾ ⁽³⁾	Read the parameter words of a Modicon X80 I/O module plugged in a local rack by performing an explicit exchange.
READ_STS_MX ⁽²⁾	Read the status words of a Modicon X80 I/O module plugged in a local rack or in an EIO drop by performing an explicit exchange.
RESTORE_PARAM_MX ⁽²⁾ ⁽³⁾	Restore the parameter words of a Modicon X80 I/O module plugged in a local rack by performing an explicit exchange.
SAVE_PARAM_MX ⁽²⁾ ⁽³⁾	Save the parameter words of a Modicon X80 I/O module plugged in a local rack by performing an explicit exchange.
WRITE_CMD_MX ⁽²⁾	Send a command to a Modicon X80 I/O module plugged in a local rack or in an EIO drop by performing an explicit exchange.
WRITE_PARAM_MX ⁽²⁾ ⁽³⁾	Write the parameter words of a Modicon X80 I/O module plugged in a local rack by performing an explicit exchange.
1: GET_TS_EVT_M is part of the System Library (SysClock family). 2: READ_STS_MX, WRITE_CMD_MX, READ_PARAM_MX, WRITE_PARAM_MX, SAVE_PARAM_MX, and RESTORE_PARAM_MX are part of the I/O Management Library (Explicit Exchange family). 3: READ_PARAM_MX, WRITE_PARAM_MX, SAVE_PARAM_MX, and RESTORE_PARAM_MX can only be used with I/O modules plugged in a local rack. When sent to a module on an EIO drop, error code 16#2007 (Unauthorized network field on slave) is returned.

Utility Functions Available on M580 CPUs

These functions are executed synchronously. A function is synchronous when it is completely executed during the CPU task that activated this function.

Utility functions role:

Name	Role
ADDM	Convert a character string into an address that can be used directly by the communication functions.
ADDMX	Convert a character string respecting the Control Expert device address syntax into an array of integers.
CANCEL	Interrupt an asynchronous communication function in progress. NOTE: Another way to cancel an asynchronous communication function in progress is to use the cancel bit of the management parameters.

NOTE:

To address a module on an EIO drop, address string to be used with ADDMX needs to be 0.0.3 {xx.xx.xx.xx} (3: channel 3 of CPU correspond to the embedded Ethernet port of the CPU, xx.xx.xx.xx corresponds to the IP address of the drop).
To address a module in a local rack with ***_MX functions, address string needs to be 0.0.10 (address of the CPU main server).