Bus Module-Specific Parameter Data; Parameter Transmission Process; Determining The Maximum Bus Module Parameter Data (System Parameters) - WAGO -I/O-SYSTEM 750 Series Manual

2.1.1.9.3.2

Bus module-specific parameter data

The following addresses are defined for access to the specific parameter data
of the AS-Interface master module:
Addres
s
0
1
2 ...
249
*)
The contents of address 0 are also entered by the module in register 33 with
the read-only attribute.
2.1.1.9.4

Parameter transmission process

Parameter data are exchanged between application and bus modules by means
of the Request-Response process. The application initiates an order with the
help of the toggle bit (TGL_MS != TGL_SM). The communications control
register (R57) then polls the module until the latter acknowledges the
execution of the order (TGL_SM == TGL_MS).
The possible orders to the parameterizing interface of the bus module are
listed in the following.
2.1.1.9.4.1 Determining the maximum bus module parameter data (system
parameters)
Request (Application)
Parameter
TGL_MS
PRM_RW
A0 ... A7
WAGO-I/O-SYSTEM 750
I/O Modules
Mode Parameter
0
R/W LB 2 ...2
8
HB 2 ...2
15
2
0
R/W LB 2
1
2 ...2
8
HB 2 ...2
R/W RESERVED
see Chapter 2.1.1.7.1 "Overview process image"
Value
!= TGL_SM
= FALSE
255
750-655 [AS-Interface master module]
Data channel for parameter exchange
Description
7
ASI_DATA_ AS-Interface data length in bytes
LEN
14
MBX_LEN Length of the mailbox to be set in bytes
MBX_ FALSE
*)
MODE
TRUE
DS_EN Internal use
7
RES Reserved for expansion
15
RES Reserved for expansion
Reserved for expansion
Meaning
Initiate order
Read access
Address of parameter data length
No superimposition of mailbox
and AS-Interface process data
Mailbox can be superimposed
on the AS-Interface process
5
data (by setting bit 2 in the
control byte)
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