Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 108)

Chapter 6
Using the Ethernet Interface
6-27
union
{
unsigned tmp;
unsigned char c[4];
} u;
unsigned make, year;
unsigned char model, type, color;
u.c[0] = pccc_rpl[13]; /* get the make from the reply buffer */
u.c[1] = pccc_rpl[14]; /* and put it in the temp buffer */
u.c[2] = pccc_rpl[15];
u.c[3] = pccc_rpl[16];
make = u.tmp; /* store make in make variable */
model = pccc_rpl[17]; /* get model from reply buffer */
type = pccc_rpl[18]; /* also type */
color = pccc_rpl[19]; /* as well as color */
u.c[0] = pccc_rpl[21]; /* get the year from the reply buffer (skip */
u.c[1] = pccc_rpl[22]; /* over pad byte at offset [21]) and put it */
u.c[2] = pccc_rpl[23]; /* in the temp buffer */
u.c[3] = pccc_rpl[24];
year = u.tmp; /* store year in year variable */
u.tmp +=1; /* increment year in tmp */
pccc_col_year[25] = u.c[0]; /* move it to write data in pccc buffer */
pccc_col_year[26] = u.c[1];
pccc_col_year[27] = u.c[2];
pccc_col_year[28] = u.c[3];
printf (”make = %X model = %X type = %X color = %X year = %X\n”,
make,model,type,color,year); /* display the ”Car” tag */ }
SNMPD is a daemon that provides Simple Network Management Protocol
(SNMP) services between the control coprocessor and a host computer.
This daemon supports MIB-1 variables. After installing the SNMPD
daemon on the control coprocessor, you have the ability to:
allow 6200 Series PLC-5 Programming Software to identify the
coprocessor on the Ethernet network using the “WHO” function.
monitor MIB-1 variables from a host computer running SNMP-
monitoring software.
Using the SNMPD Daemon