Siemens SIMATIC S7-200 System Manual page 330

S7-200 Programmable Controller System Manual
-- The Phone Number field is the telephone number of the messaging service provider.
For text messages this is the telephone number of the modem line the service
provider uses to accept text messages. For numeric paging this is the telephone
number of the pager itself. The Modem module allows the telephone number field to
be a maximum of 40 characters. The following characters are allowed in telephone
numbers that the Modem module uses to dial out:
0 to 9
A B C D * #
,
!
@
W
( )--
The dash character (--) is only supported in Version 1.1 of the EM 241 Modem
module.
-- The Specific Pager ID or Cell Phone Number field is where you enter the pager
number or cellular telephone number of the message recipient. This number should
not contain any characters except the digits 0 through 9. A maximum of 20
characters is allowed.
-- The Password field is optional for TAP message. Some providers require a password
but normally this field should be left blank. The Modem module allows the password
to be up to 15 characters.
-- The Originating Phone Number field allows the Modem module to be identified in the
SMS message. This field is required by some service providers which use UCP
commands. Some service providers might require a minimum number of characters
in this field. The Modem module allows up to 15 characters.
-- The Modem Standard field is provided for use in cases where the Modem module
and the service provider modem cannot negotiate the modem standard. The default
is V.34 (33.6 kBaud).
-- The Data Format fields allow you to adjust the data bits and parity used by the
modem when transmitting a message to a service provider. TAP normally used 7
data bits and even parity, but some service providers use 8 data bits and no parity.
UCP always uses 8 data bits with no parity. Check with the service provider to
determine which settings to use.
8. You can configure the Modem module to transfer data to another S7-200 CPU (if PPI
protocol was selected) or to transfer data to a Modbus device (if Modbus protocol was
selected). Check the Enable CPU data transfers checkbox and click the Configure
CPU-to... button to define the data transfers and the telephone numbers of the remote
devices.
9. When setting up a CPU-to-CPU or a CPU-to-Modbus data transfer you must define the data
to transfer and the telephone number of the remote device. Select the Data Transfers tab
on the Configure Data Transfers screen and click the New Transfer button. A data transfer
consists of a data read from the remote device, a data write to the remote device, or both a
read from and a write to the remote device. If both a read and a write are selected, the read
is performed first and then the write.
Up to 100 words can be transferred in each read or write. Data transfers must be to or from
the V Memory in the local CPU. The wizard always describes the memory locations in the
remote device as if the remote device is an S7-200 CPU. If the remote device is a Modbus
device, the transfer is to or from holding registers in the Modbus device (address 04xxxx).
The equivalent Modbus address (xxxx) is determined as follows:
Modbus address
V memory address = (Modbus address -- 1) * 2
316
allowed from a telephone keypad
DTMF digits (tone dialing only)
pause dialing for 2 seconds
commands the modem to generate a hook flash
wait for 5 seconds of silence
wait for a dial tone before continuing
ignored (can be used to format the telephone number)
= 1 + (V memory address / 2)