Rockwell Automation 57C442 Data Highway Plus Interface Module - Manual (Page 23)

4-5
Mapping is handled transparently by the Data Highway Plus Interface
module software. For example, if another node writes to this node at
address N7:0, the data is written starting at AutoMax register 4384, and
so on.
4.1.3 Global Data Registers
Registers 4096-4159 contain all of the global data that can exist on a
Data Highway Plus network. Each station is assigned one register.
Particular locations are meaningful only if the corresponding station is
writing global data. All registers are read only from the point of view of
the AutoMax Processor except for register 4352, which is read-write.
The global data update rate depends on the number of stations on the
network, whether the stations have global data transmission enabled,
and the communication traffic on the network.
Register Description Register Description
4096 Global data station 00 (00) 4130 Global data station 42 (34)
4097 Global data station 01 (01) 4131 Global data station 43 (35)
4098 Global data station 02 (02) 4132 Global data station 44 (36)
4099 Global data station 03 (03) 4133 Global data station 45 (37)
4100 Global data station 04 (04) 4134 Global data station 46 (38)
4101 Global data station 05 (05) 4135 Global data station 47 (39)
4102 Global data station 06 (06) 4136 Global data station 50 (40)
4103 Global data station 07 (07) 4137 Global data station 51 (41)
4104 Global data station 10 (08) 4138 Global data station 52 (42)
4105 Global data station 11 (09) 4139 Global data station 53 (43)
4106 Global data station 12 (10) 4140 Global data station 54 (44)
4107 Global data station 13 (11) 4141 Global data station 55 (45)
4108 Global data station 14 (12) 4142 Global data station 56 (46)
4109 Global data station 15 (13) 4143 Global data station 57 (47)
4110 Global data station 16 (14) 4144 Global data station 60 (48)
4111 Global data station 17 (15) 4145 Global data station 61 (49)
4112 Global data station 20 (16) 4146 Global data station 62 (50)
4113 Global data station 21 (17) 4147 Global data station 63 (51)
4114 Global data station 22 (18) 4148 Global data station 64 (52)
4115 Global data station 23 (19) 4149 Global data station 65 (53)
4116 Global data station 24 (20) 4150 Global data station 66 (54)
4117 Global data station 25 (21) 4151 Global data station 67 (55)
4118 Global data station 26 (22) 4152 Global data station 68 (56)
4119 Global data station 27 (23) 4153 Global data station 69 (57)
4120 Global data station 30 (24) 4154 Global data station 70 (58)
4121 Global data station 31 (25) 4155 Global data station 71 (59)
4122 Global data station 32 (26) 4156 Global data station 72 (60)
4123 Global data station 33 (27) 4157 Global data station 73 (61)
4124 Global data station 34 (28) 4158 Global data station 74 (62)
4125 Global data station 35 (29) 4159 Global data station 75 (63)
4126 Global data station 36 (30) 4160- Note used. Reserved for
4127 Global data station 37 (31) 4351 future use.
4128 Global data station 40 (32) 4352 This station’s global data.
4129 Global data station 41 (33)
Note that station numbers are inoctal with decimal equivalents in parentheses.
Figure 4.4 – Global Data Register Assignments