Instruction Manual

PPC-2000 User’s Guide Chapter 5: LogicPro and Modbus Reference
Doc.# 30002-00 Rev 2.3 Watlow Anafaze 207
Accessing Global Parameters with LogicPro
When a logic program variable accesses global parameters, the
parameter number (#) and the offset are used in conjunction
with the LogicPro Database I/O driver. The I/O physical
address is constructed from the parameter number and the
database offset.
See the LogicPro User’s Guide for specific instructions on
addressing global parameters. See Table 5.48 on page 208 and
Table 5.51 on page 209 for the parameter number (#) and the
parameter descriptions for database offsets for each global
parameter.
Communications Parameters
For multiple PPC installations, each PPC must have a unique
network address. As many as 32 PPC systems may
communicate on a network. Network addresses 1 through 4 can
be set using the rotary switch on the processor module.
Use setting D and PPCComSU to program the remaining
addresses (5-32). Refer to Setting Programmable Modbus
Addresses on page 87 for programming information.
Changed communication parameters do not take affect until
the controller resets or cycles power, and only with the
appropriate rotary switch settings on the Processor module.
NOTE! Do not cycle power with the rotary switch set in
positions E-G unless specifically directed to do so.
These positions are used for clearing memory and
other functions. Parameter settings can be lost. See
Chapter 4, Troubleshooting, for more on these switch
settings.
Table 5.47 Rotary Switch Configuration
Position Network Address
A Fixed: 1
B Fixed: 2
C Fixed: 3
D Programmable, Default: 4
E-G N/A
H Fixed: 1