Siemens SIMATIC S7-200 System Manual page 334

S7-200 Programmable Controller System Manual
MODx_MSG Instruction
The MODx_MSG (Send Message) instruction is used to
send a paging or SMS message from Modem module. This
instruction requires 20 to 30 seconds from the time the
START input is triggered until the Done bit is set.
The EN bit must be on to enable a command to the module,
and should remain on until the Done bit is set, signaling
completion of the process. A MSG command is sent to the
Modem module on each scan when START input is on and
the module is not currently busy. The START input can be
pulsed on through an edge detection element, which only
allows one command to be sent.
Phone is the number of one of the message telephone
numbers. You can use the symbolic name you assigned to
each message telephone number the when the number
was defined with the Modem Expansion wizard.
Msg is the number of one of the defined messages. You
can use the symbolic name you assigned to the message
when the message was defined using the Modem
Expansion wizard.
Done is a bit that comes on when the Modem module completes the sending of the message to
the service provider.
Error is a byte that contains the result of this request to the module. Table 10-8 defines the
possible error conditions that could result from executing this instruction.
Table 10-7 Parameters for the MODx_MSG Instruction
Inputs/Outputs
START
Phone, Msg
Done
Error
320
Data Type Operands
BOOL I, Q, M, S, SM, T, C, V, L, Power Flow
BYTE VB, IB, QB, MB, SB, SMB, LB, AC, Constant, *VD, *AC, *LD
BOOL I, Q, M, S, SM, T, C, V, L
BYTE VB, IB, QB, MB, SB, SMB, LB, AC, *VD, *AC, *LD