Siemens SIMATIC NET CP 243-1 User Manual

Configuration 09/02
CP 243-1
44 J31069-D0428-U001-A1-7618
Byte offset in
variables memory
Name Description Data
format
... COM_CHr_OFF 1 byte hex
... COM_CHr_LEN0 1 byte hex
... ... 1 byte hex
... COM_CHr_LENp 1 byte hex
... COM_CHr_0 ASCII
... ... ASCII
... COM_CHr_p ASCII
CRC section
The last two bytes
of the NDB
CRC over all NDB
bytes without the
CRC section itself
2 bytes hex The last two
bytes of the
NDB
Table 5: NDB structure
Name Description Data
format
<op> Command type
Value range: “R“ for a “read“,
“W“ for a “write“
ASCII
<cnt> Number of bytes to be transmitted
Value range: "1“ to “212“
ASCII
<local_buffer> Address of memory area in local system
Value range:
“VB0“ to “VBx“, where x is the max. V address
ASCII
<remote_buffer> Address of memory area in communication partner
Value range:
“IB0“ to “IBx“, where x is the max. input address
(S7-200 / S7-300 / S7-400)
“QB0“ to “QBx“, where x is the max. output address
(S7-200 / S7-300 / S7-400)
“MB0“ to “MBx", where x is the max. flag address
(S7-200 / S7-300 / S7-400)
“VB0“ to “VBx“, where x is the max. variables address
(S7-200)
“DB0.DBB0“ to “DBx.DBBy“, where x is the max. DB
number,
y is the highest address in the corresponding data block
within the DB (S7-300 / S7-400)
ASCII
Table 6: Configuration of read/write commands

Siemens SIMATIC NET CP 243-1 Specifications

General

Brand	Siemens
Model	SIMATIC NET CP 243-1
Category	Computer Hardware
Language	English